The document provides an overview of encryption, digital signatures, and SSL certificates. It discusses how public key encryption uses a private key and public key to encrypt messages. Digital signatures authenticate the identity of the sender and ensure messages remain intact. SSL certificates allow browsers and servers to establish an encrypted connection by containing a public key and verifying identity with a Certificate Authority. The client's browser verifies the server's certificate with the CA to trust the secure connection.
This presentation contains the total understanging of Digital Certificate ,What is the need and what are the main types of Digital certificates available.
This presentation contains the total understanging of Digital Certificate ,What is the need and what are the main types of Digital certificates available.
Presented at Seminar at Bahria University June 2007
Cryptography Simplified - Symmetric Key, Public Key, PKI, Digital Signature, Certification Authority, Secure Socket Layer (SSL), Secure Electronic Transaction (SET)
How to design a digital signature in odooPlanetOdoo
Odoo Digital Signature is a fast and beneficial way to send, sign and approve documents. The Odoo digital signature can be very important for documents such as sale orders, purchase orders, invoices, payslips, procurement receipts, etc.
A digital signature is a mathematical scheme for demonstrating the authenticity of a digital message or document. A valid digital signature gives a recipient reason to believe that the message was created by a known sender, such that the sender cannot deny having sent the message (authentication and non-repudiation) and that the message was not altered in transit (integrity). Digital signatures are commonly used for software distribution, financial transactions, and in other cases where it is important to detect forgery or tampering.
Digital signatures are often used to implement electronic signatures, a broader term that refers to any electronic data that carries the intent of a signature, but not all electronic signatures use digital signatures. In some countries, including the United States, India, and members of the European Union, electronic signatures have legal significance.
Hyperledger Indy Platform - Privacy, Security and Power for Digital Identity ...Gokul Alex
Blockchain Engineering Workshop for World Blockchain Conclave organised by 1point2GWS. Session on Hyperledger Indy Framework, Architecture Model, Components, Modules, Workflows. Demonstrated Verifiable Organisation Networks and Decentralised Workflows on Hyperledger Indy. Demonstrated Hyperledger Indy CLI and Indy Sandbox. Deep Dive on Decentralised Identifiers ( DID ) and the goals of DID. An overview of Sovrin platform is included.
This presentation covers:
What is Digital Signature ?
How does digital signature work?
Advantages and Shortcomings of Digital Signatures
What is e-Commerce
How does e-commerce work?
Advantages and Disadvantages of e-commerce
Let's get started with passwordless authentication using windows hello in you...Chris Ryu
This demonstrates deploying your own FIDO authentication infrastructure to your Azure. Deploy a FIDO server and describe how Windows Hello works with the FIDO server. With Windows Hello and FIDO Server, you can implement secure authentication on your infrastructure.
If people is considering passwordless system in their own cloud infrastructure, this session can provide such as their requirement. This shows how to deploy FIDO 1.0, 2 to their infra structure to implement passwordless system in their infrastructure for desktop & mobile.
A digital code that can be attached to an electronically transmitted message that uniquely identifies the sender. Like a written signature, the purpose of a digital signature is to guarantee that the individual sending the message really is who he or she claims to be. Digital signatures are especially important for electronic commerce and are a key component of most authentication schemes. To be effective, digital signatures must be unforgettable. There are a number of different encryption techniques to guarantee this level of security.
Presented at Seminar at Bahria University June 2007
Cryptography Simplified - Symmetric Key, Public Key, PKI, Digital Signature, Certification Authority, Secure Socket Layer (SSL), Secure Electronic Transaction (SET)
How to design a digital signature in odooPlanetOdoo
Odoo Digital Signature is a fast and beneficial way to send, sign and approve documents. The Odoo digital signature can be very important for documents such as sale orders, purchase orders, invoices, payslips, procurement receipts, etc.
A digital signature is a mathematical scheme for demonstrating the authenticity of a digital message or document. A valid digital signature gives a recipient reason to believe that the message was created by a known sender, such that the sender cannot deny having sent the message (authentication and non-repudiation) and that the message was not altered in transit (integrity). Digital signatures are commonly used for software distribution, financial transactions, and in other cases where it is important to detect forgery or tampering.
Digital signatures are often used to implement electronic signatures, a broader term that refers to any electronic data that carries the intent of a signature, but not all electronic signatures use digital signatures. In some countries, including the United States, India, and members of the European Union, electronic signatures have legal significance.
Hyperledger Indy Platform - Privacy, Security and Power for Digital Identity ...Gokul Alex
Blockchain Engineering Workshop for World Blockchain Conclave organised by 1point2GWS. Session on Hyperledger Indy Framework, Architecture Model, Components, Modules, Workflows. Demonstrated Verifiable Organisation Networks and Decentralised Workflows on Hyperledger Indy. Demonstrated Hyperledger Indy CLI and Indy Sandbox. Deep Dive on Decentralised Identifiers ( DID ) and the goals of DID. An overview of Sovrin platform is included.
This presentation covers:
What is Digital Signature ?
How does digital signature work?
Advantages and Shortcomings of Digital Signatures
What is e-Commerce
How does e-commerce work?
Advantages and Disadvantages of e-commerce
Let's get started with passwordless authentication using windows hello in you...Chris Ryu
This demonstrates deploying your own FIDO authentication infrastructure to your Azure. Deploy a FIDO server and describe how Windows Hello works with the FIDO server. With Windows Hello and FIDO Server, you can implement secure authentication on your infrastructure.
If people is considering passwordless system in their own cloud infrastructure, this session can provide such as their requirement. This shows how to deploy FIDO 1.0, 2 to their infra structure to implement passwordless system in their infrastructure for desktop & mobile.
A digital code that can be attached to an electronically transmitted message that uniquely identifies the sender. Like a written signature, the purpose of a digital signature is to guarantee that the individual sending the message really is who he or she claims to be. Digital signatures are especially important for electronic commerce and are a key component of most authentication schemes. To be effective, digital signatures must be unforgettable. There are a number of different encryption techniques to guarantee this level of security.
This presentation will give you short and not very technical overview about claims-based authentication.
The claims-based authentication will be the way to almost all Microsoft web-based platforms around. It is more complex than old username-password method but also more secure and general.
2010: A Web Hacking Odyssey - Top Ten Hacks of the YearJeremiah Grossman
Many notable and new Web hacking techniques have already been revealed in 2009. During his session, Jeremiah Grossman will describe the technical details of the top ten from 2009, as well as some of the prevalent security issues emerging in 2010. By attending Mr. Grossman’s session, attendees will be treated to a step-by-step guided tour of the newest threats targeting today’s corporate websites and enterprise users. With that knowledge, Mr. Grossman will then strategize what defensive solutions will have the most impact.
Mr. Grossman will begin his presentation by providing the audience with definitions of the key terms and techniques used in his session. After laying this foundation, Mr. Grossman will move on to identifying the top ten attacks in 2009, including hacks involving Rich Internet Applications, Social Networking, Cloud Computing, Mobile Web Applications, Next Generation Web Browsers and HTML 5. Mr. Grossman will briefly identify real-world examples of each of these vulnerabilities in action, outlining how the issue occurs, as well as what preventative measures can be taken.
Mr. Grossman will also stress the importance of security professionals remaining proactive and continuing to move research forward, as analysis of attacks from years past only goes so far as hackers continue to push the envelop of what’s possible in the ever-changing Web security landscape.
Travel Hacking 101 will teach you the basics of travel hacking. You'll learn how to strategically collect miles and points and use them to travel the world for pennies on the dollar!
New to travel hacking? Want to learn more? Check out my site at http://natebuchanan.org/budget-travel-101/
This is the first part of the web hacking series. It covers some basics and three topics:
~HTMLI
~SQLI to bypass user authentication
~Buffer overflow
I used mutillidae for the demo
Today is the age of computer and internet. More and more people are creating their own websites to market their products and earn more profit from it. Having our own website will definitely help us in getting more customers purchasing our products but at the same time we can also attract hackers to play around with our website. If we have not taken enough care to protect our website from hackers then our business can even come to an end because of these hackers. If we own a website, then we might know the importance of ensuring that our website is safe from viruses and hackers.
After going online most of the website designers think that their work is over. They have delivered what they were paid for and now they will be available for the maintenance of the site only. But sometimes the main problem starts after publishing the website. What if the website they have built suddenly start showing different stuff from what was already present there? What if weird things start appearing on the pages of our website? And most horribly what if the password of our login panel has changed and we are not able to login into our website. This is called hacking, a website hacking. We have to figure out how this happened so we can prevent it from happening again. In this seminar we are going to discuss some of major website hacking techniques and we are also going to discuss how to prevent website from getting vulnerable to different attacks currently use by various hackers.
The power of Structured Journalism & Hacker Culture in NPRPoderomedia
A keynote Miguel Paz gave for a brown bag lunch at NPR in April, 2015, organized by the Research, Analysis and Data team of this awesome media organization. While it is focused on NPR most of the ideas apply to other news organizations as well.
Top Ten Web Hacking Techniques of 2008:
"What's possible, not probable"
The polls are closed, votes are in, and we have the winners making up the Top Ten Web Hacking Techniques of 2008! The competition was fierce with the newest and most innovative web hacking techniques to the test. This session will review the top ten hacks from 2008 - what they indicate about the security of the web, what they mean for businesses, and what might be used against us soon down the road.
Certificate pinning in android applicationsArash Ramez
How to do cryptography right in android
Part #4 / How to mitigate MITM attacks in SSL/TLS channels using server certification validation
watch it on youtube:
https://www.youtube.com/playlist?list=PLT2xIm2X7W7gZ0mtoAA8JrfFrvOKr1Qlp
Stands for "Secure Sockets Layer." SSL is a secure protocol developed for sending information securely over the Internet. Many websites use SSL for secure areas of their sites, such as user account pages and online checkout. Usually, when you are asked to "log in" on a website, the resulting page is secured by SSL.
I would appreciate help with these 4 questions. Thank You.1) Expla.pdfJUSTSTYLISH3B2MOHALI
I would appreciate help with these 4 questions. Thank You.
1) Explain what the following are: root certificates, self-signed certificates. Describe how they
are used. Provide some examples of each explaining how they are used. You should be able to
find examples of each on your system by looking through various options available on your
browser.
2) Provide a listing of the fields associated with a certificate of your choosing. Use the X509
definition to match the general fields of a certificate with the certificate you choose to look at.
Describe each field.
3) Your manager is considering implementing a PKI infrastructure. They are considering using
RSA encryption technology for the central part of their infrastructure. You manager would like
to know some products or services that utilize RSA encryption technology. Provide three
examples and explain how they make use of the RSA encryption technology. Provide a few
original sentences describing each of your examples.
4) Compare the functionality offered by the RSA and Diffie-Hellman algorithms.
Solution
A Root SSL certificate could be a certificate issued by a trusty certificate authority (CA).In the
SSL system, anyone will generate a language key and sign a replacement certificate therewith
signature. However, that certificate isn\'t thought-about valid unless it\'s been directly or
indirectly signed by a trusty CA.A trusty certificate authority is Associate in Nursing entity that
has been entitled to verify that somebody is effectively World Health Organization it declares to
be. so as for this model to figure, all the participants on the sport should agree on a group of CA
that they trust. All operational systems and most of net browsers ship with a group of trusty
CAs.The SSL system is predicated on a model of trust relationship, conjointly known as “chain
of trust”. once a tool validates a certificate, it compares the certificate establishment with the list
of trusty CAs. If a match isn\'t found, the shopper can then check to check if the certificate of the
supplying CA was issued by a trusty CA, so on till the tip of the certificate chain. the highest of
the chain, the basis certificate, should be issued by a trusty Certificate Authority.
Self-signed certificates or certificates issued by a non-public CAs aren\'t appropriate to be used
with the overall public.A certificate serves two essential purpose distribute the public key and
verifying the individuality of the server so guests know they aren’t sending their information to
the wrong person. It can only properly verify the identity of the server when it is signed by a
trusted third party because any attacker can create a self-signed certificate and launch a man-in-
the-middle attack. If a user just accept a self-signed certificate, an attacker could drop on all the
traffic or try to set up an imitation server to phish additional information out of the user. Because
of this, you will approximately on no account want to use a self signe.
SSL Certificate is a very common term that we definitely heard but there is only limited number of people who know it is meaning or what is it? Actually SSL stands for Secure Socket Layer Protocol which helps to secure more safety in the internet world. it was developed by Netscape and issued by the Certificate Authorities.
May Marketo Masterclass, London MUG May 22 2024.pdfAdele Miller
Can't make Adobe Summit in Vegas? No sweat because the EMEA Marketo Engage Champions are coming to London to share their Summit sessions, insights and more!
This is a MUG with a twist you don't want to miss.
Software Engineering, Software Consulting, Tech Lead.
Spring Boot, Spring Cloud, Spring Core, Spring JDBC, Spring Security,
Spring Transaction, Spring MVC,
Log4j, REST/SOAP WEB-SERVICES.
AI Pilot Review: The World’s First Virtual Assistant Marketing SuiteGoogle
AI Pilot Review: The World’s First Virtual Assistant Marketing Suite
👉👉 Click Here To Get More Info 👇👇
https://sumonreview.com/ai-pilot-review/
AI Pilot Review: Key Features
✅Deploy AI expert bots in Any Niche With Just A Click
✅With one keyword, generate complete funnels, websites, landing pages, and more.
✅More than 85 AI features are included in the AI pilot.
✅No setup or configuration; use your voice (like Siri) to do whatever you want.
✅You Can Use AI Pilot To Create your version of AI Pilot And Charge People For It…
✅ZERO Manual Work With AI Pilot. Never write, Design, Or Code Again.
✅ZERO Limits On Features Or Usages
✅Use Our AI-powered Traffic To Get Hundreds Of Customers
✅No Complicated Setup: Get Up And Running In 2 Minutes
✅99.99% Up-Time Guaranteed
✅30 Days Money-Back Guarantee
✅ZERO Upfront Cost
See My Other Reviews Article:
(1) TubeTrivia AI Review: https://sumonreview.com/tubetrivia-ai-review
(2) SocioWave Review: https://sumonreview.com/sociowave-review
(3) AI Partner & Profit Review: https://sumonreview.com/ai-partner-profit-review
(4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review
GraphSummit Paris - The art of the possible with Graph TechnologyNeo4j
Sudhir Hasbe, Chief Product Officer, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
Top Features to Include in Your Winzo Clone App for Business Growth (4).pptxrickgrimesss22
Discover the essential features to incorporate in your Winzo clone app to boost business growth, enhance user engagement, and drive revenue. Learn how to create a compelling gaming experience that stands out in the competitive market.
OpenFOAM solver for Helmholtz equation, helmholtzFoam / helmholtzBubbleFoamtakuyayamamoto1800
In this slide, we show the simulation example and the way to compile this solver.
In this solver, the Helmholtz equation can be solved by helmholtzFoam. Also, the Helmholtz equation with uniformly dispersed bubbles can be simulated by helmholtzBubbleFoam.
Custom Healthcare Software for Managing Chronic Conditions and Remote Patient...Mind IT Systems
Healthcare providers often struggle with the complexities of chronic conditions and remote patient monitoring, as each patient requires personalized care and ongoing monitoring. Off-the-shelf solutions may not meet these diverse needs, leading to inefficiencies and gaps in care. It’s here, custom healthcare software offers a tailored solution, ensuring improved care and effectiveness.
Enhancing Research Orchestration Capabilities at ORNL.pdfGlobus
Cross-facility research orchestration comes with ever-changing constraints regarding the availability and suitability of various compute and data resources. In short, a flexible data and processing fabric is needed to enable the dynamic redirection of data and compute tasks throughout the lifecycle of an experiment. In this talk, we illustrate how we easily leveraged Globus services to instrument the ACE research testbed at the Oak Ridge Leadership Computing Facility with flexible data and task orchestration capabilities.
Listen to the keynote address and hear about the latest developments from Rachana Ananthakrishnan and Ian Foster who review the updates to the Globus Platform and Service, and the relevance of Globus to the scientific community as an automation platform to accelerate scientific discovery.
Cyaniclab : Software Development Agency Portfolio.pdfCyanic lab
CyanicLab, an offshore custom software development company based in Sweden,India, Finland, is your go-to partner for startup development and innovative web design solutions. Our expert team specializes in crafting cutting-edge software tailored to meet the unique needs of startups and established enterprises alike. From conceptualization to execution, we offer comprehensive services including web and mobile app development, UI/UX design, and ongoing software maintenance. Ready to elevate your business? Contact CyanicLab today and let us propel your vision to success with our top-notch IT solutions.
First Steps with Globus Compute Multi-User EndpointsGlobus
In this presentation we will share our experiences around getting started with the Globus Compute multi-user endpoint. Working with the Pharmacology group at the University of Auckland, we have previously written an application using Globus Compute that can offload computationally expensive steps in the researcher's workflows, which they wish to manage from their familiar Windows environments, onto the NeSI (New Zealand eScience Infrastructure) cluster. Some of the challenges we have encountered were that each researcher had to set up and manage their own single-user globus compute endpoint and that the workloads had varying resource requirements (CPUs, memory and wall time) between different runs. We hope that the multi-user endpoint will help to address these challenges and share an update on our progress here.
Large Language Models and the End of ProgrammingMatt Welsh
Talk by Matt Welsh at Craft Conference 2024 on the impact that Large Language Models will have on the future of software development. In this talk, I discuss the ways in which LLMs will impact the software industry, from replacing human software developers with AI, to replacing conventional software with models that perform reasoning, computation, and problem-solving.
Climate Science Flows: Enabling Petabyte-Scale Climate Analysis with the Eart...Globus
The Earth System Grid Federation (ESGF) is a global network of data servers that archives and distributes the planet’s largest collection of Earth system model output for thousands of climate and environmental scientists worldwide. Many of these petabyte-scale data archives are located in proximity to large high-performance computing (HPC) or cloud computing resources, but the primary workflow for data users consists of transferring data, and applying computations on a different system. As a part of the ESGF 2.0 US project (funded by the United States Department of Energy Office of Science), we developed pre-defined data workflows, which can be run on-demand, capable of applying many data reduction and data analysis to the large ESGF data archives, transferring only the resultant analysis (ex. visualizations, smaller data files). In this talk, we will showcase a few of these workflows, highlighting how Globus Flows can be used for petabyte-scale climate analysis.
We describe the deployment and use of Globus Compute for remote computation. This content is aimed at researchers who wish to compute on remote resources using a unified programming interface, as well as system administrators who will deploy and operate Globus Compute services on their research computing infrastructure.
Globus Compute wth IRI Workflows - GlobusWorld 2024Globus
As part of the DOE Integrated Research Infrastructure (IRI) program, NERSC at Lawrence Berkeley National Lab and ALCF at Argonne National Lab are working closely with General Atomics on accelerating the computing requirements of the DIII-D experiment. As part of the work the team is investigating ways to speedup the time to solution for many different parts of the DIII-D workflow including how they run jobs on HPC systems. One of these routes is looking at Globus Compute as a way to replace the current method for managing tasks and we describe a brief proof of concept showing how Globus Compute could help to schedule jobs and be a tool to connect compute at different facilities.
In software engineering, the right architecture is essential for robust, scalable platforms. Wix has undergone a pivotal shift from event sourcing to a CRUD-based model for its microservices. This talk will chart the course of this pivotal journey.
Event sourcing, which records state changes as immutable events, provided robust auditing and "time travel" debugging for Wix Stores' microservices. Despite its benefits, the complexity it introduced in state management slowed development. Wix responded by adopting a simpler, unified CRUD model. This talk will explore the challenges of event sourcing and the advantages of Wix's new "CRUD on steroids" approach, which streamlines API integration and domain event management while preserving data integrity and system resilience.
Participants will gain valuable insights into Wix's strategies for ensuring atomicity in database updates and event production, as well as caching, materialization, and performance optimization techniques within a distributed system.
Join us to discover how Wix has mastered the art of balancing simplicity and extensibility, and learn how the re-adoption of the modest CRUD has turbocharged their development velocity, resilience, and scalability in a high-growth environment.
2. ABSTRACT
THIS PRESENTATION IS JUST PROVIDING
THE BASIC CONCEPTS OF THE DIGITAL
CERTIFICATES, AND DIGITAL SIGNATURES
WITHOUT PROVIDING ANY TECHNICAL
SOLUTION OR PREFERABLE
TECHNOLOGIES.
3. ENCRYPTION
Encryption is the conversion of data into a form, called a CIPHER Text.
The use of encryption/decryption is as old as the art of communication.
Encryption/decryption is especially important in wireless communications.
Encryption/decryption is a good idea when carrying out any kind of sensitive transaction.
Ex: A credit-card purchase online, or the discussion of a company secret between different departments in the organization.
4. TYPES OF ENCRYPTION
PRIVATE KEY ENCRYPTION means that each
computer has a secret key (code) that it
can use to encrypt a packet of information
before it is sent over the network to the
other computer.
PUBLIC KEY ENCRYPTION uses a combination of a
private key and a public key.
The key is based on a hash value. This is a value that is computed from a base input number
using a hashing algorithm.
5. DIGITAL SIGNATURES
A DIGITAL SIGNATURE OR DIGITAL SIGNATURE
SCHEME IS A MATHEMATICAL SCHEME FOR
DEMONSTRATING THE AUTHENTICITY OF A DIGITAL
MESSAGE OR DOCUMENT.
A DIGITAL SIGNATURE CAN BE USED WITH ANY KIND
OF MESSAGE, WHETHER IT IS ENCRYPTED OR NOT,
SIMPLY SO THAT THE RECEIVER CAN BE SURE OF THE
SENDER'S IDENTITY AND THAT THE MESSAGE ARRIVED
INTACT.
6. CREATION OF DIGITAL SIGNATURES
a digital signature scheme typically
consists of three algorithms:
• hashing algorithm.
• signature generation algorithm
• a signature verifying algorithm that, given a message, public
key and a signature, either accepts or rejects the message's
claim to authenticity.
7. METHODS OF ENCRYPTION BASED ON PRIVACY
•a message may be digitally signed, but not
encrypted
•a message may be encrypted first, then
digitally signed
•a message may be digitally signed first, then
encrypted
Encryption scrambles or modifies a message or document so it cannot be read and understood, except by the intended recipient.
A key is necessary to reverse the scrambling or modification, to make the message readable.
8. PREREQUISITES TO CREATE A DIGITAL SIGNATURE
• Public-private digital key pair
• Certificate Authority.
• The public key certificate creates proof of the identity of the signer by using
the services of a certificate authority.
• A certificate authority uses a variety of processes to associate the particular
public key with an individual.
• The combination of public key and proof of identity result in a public key
certificate - also called a signer's certificate.
11. SECURE SOCKET LAYER (SSL)
SSL (Secure Sockets Layer) is a standard security
technology for establishing an encrypted link between a
server and a client—typically a web server (website)
and a browser; or a mail server and a mail client
12. Where Do Certificates Come In?
All browsers have the capability to interact with secured web
servers using the SSL protocol. However, the browser and the
server need what is called an SSL Certificate to be able to
establish a secure connection.
13. What is an SSL Certificate? How Does it Work?
SSL Certificates have a key pair: a public and a
private key. These keys work together to
establish an encrypted connection. The certificate
also contains what is called the “subject,” which is
the identity of the certificate/website owner.
14. How Does it Work?
• To get a certificate, you must create a Certificate Signing
Request (CSR) on your server.
• This process creates a private key and public key on your
server.
• The CSR data file that you send to the SSL Certificate issuer
(called a Certificate Authority or CA) contains the public
key.
• The CA uses the CSR data file to create a data structure to
match your private key without compromising the key itself.
The CA never sees the private key.
15. Certification Authority (CA)
•A trusted agent who certifies public keys for general
use (Corporation or Bank).
–User has to decide which CAs can be trusted.
•The model for key certification based on friends and
friends of friends is called “Web of Trust”.
–The public key is passing from friend to friend.
–Works well in small or high connected worlds.
–What if you receive a public key from someone you
don’t know?
16. (CA MODEL) TRUST MODEL
Root Certificate
CA Certificate
Browser Cert.
CA Certificate
Server Cert.
23. What is the difference between Server Certificate and Client Certificate?
How can I differentiate between them?
How does IIS distinguish between Client and Server Certificates?
Can I use a Server Certificate as a Client Certificate or Vice-Versa?
Symmetric Encryption
Symmetric encryption is the oldest and best-known technique. A secret key, which can be a number, a word, or just a string of random letters, is applied to the text of a message to change the content in a particular way. This might be as simple as shifting each letter by a number of places in the alphabet. As long as both sender and recipient know the secret key, they can encrypt and decrypt all messages that use this key.
Asymmetric Encryption
The problem with secret keys is exchanging them over the Internet or a large network while preventing them from falling into the wrong hands. Anyone who knows the secret key can decrypt the message. One answer is asymmetric encryption, in which there are two related keys--a key pair. A public key is made freely available to anyone who might want to send you a message. A second, private key is kept secret, so that only you know it. Any message (text, binary files, or documents) that are encrypted by using the public key can only be decrypted by applying the same algorithm, but by using the matching private key. Any message that is encrypted by using the private key can only be decrypted by using the matching public key. This means that you do not have to worry about passing public keys over the Internet (the keys are supposed to be public). A problem with asymmetric encryption, however, is that it is slower than symmetric encryption. It requires far more processing power to both encrypt and decrypt the content of the message.
Public Key cryptography also known as asymmetric cryptography, is a class of cryptographic algorithms which requires two separate keys, one of which is secret (or private) and one of which is public. Although different, the two parts of this key pair are mathematically linked. The public key is used to encrypt plaintext or to verify a digital signature; whereas the private key is used to decrypt ciphertext or to create a digital signature. The term "asymmetric" stems from the use of different keys to perform these opposite functions, each the inverse of the other – as contrasted with conventional ("symmetric") cryptography which relies on the same key to perform both,
Public-key encryption, in which a message is encrypted with a recipient's public key. The message cannot be decrypted by anyone who does not possess the matching private key, who is thus presumed to be the owner of that key and the person associated with the public key. This is used in an attempt to ensure confidentiality.
Digital signatures are based on public key cryptography, also known as asymmetric cryptography. Using a public key algorithm such as RSA, one can generate two keys that are mathematically linked: one private and one public. To create a digital signature, signing software (such as an email program) creates a one-way hash of the electronic data to be signed. The private key is then used to encrypt the hash. The encrypted hash -- along with other information, such as the hashing algorithm -- is the digital signature. The reason for encrypting the hash instead of the entire message or document is that a hash function can convert an arbitrary input into a fixed length value, which is usually much shorter. This saves time since hashing is much faster than signing.