The ssh protocol
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The SSH protocol specifies how to securely communicate over a network by providing authentication of users, encryption of data, and integrity checks to ensure data is not altered. It authenticates users through digital identity proofs, encrypts data to scramble it so it is unintelligible to anyone but the intended recipients, and guarantees data traveling over the network arrives unaltered through integrity checks.
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SSh_part_1.pptx
SSH (Secure Shell) is a protocol that allows secure remote access and file transfers over unsecured networks. It uses encryption and authentication to provide security. SSH clients connect to SSH servers to remotely control servers and transfer files securely. It protects confidentiality with encryption, integrity with message authentication codes and hashes, and authentication with digital proofs of identity.
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Let's Encrypt! Wait. Why? How?
On December 3rd, 2015 (one day before the inaugural WordCamp USA) a service called Let’s Encrypt entered its public beta. Backed by several major sponsors (including Automattic), the service caught on quickly. As of summer 2016, more than 5 million SSL certificates had been issued by Let’s Encrypt, nearly four million of which were active and unexpired.
If you are not familiar, Let’s Encrypt is a free, automated, open certificate authority that allows users to encrypt the data flowing to and from their websites easily and for free. The goal of Let’s Encrypt is to make data transfer over the internet secure by default. Towards that end, they have invested a considerable amount of time and energy in making it easy for users of all stripes to secure the data flowing in and out of their websites.
You may have already considered encrypting your website before — perhaps to perform better in search engines, or to gain the ability to accept payments on your website. Regardless of whether you’ve considered enabling SSL on your website or not, the goal of this talk is to demonstrate why encryption on your website matters. We will look at some practical examples and live demos of what data can be stolen from your website, even if you using an encrypted wifi connection. Likewise, we’ll talk about how encryption of all websites — whether they’re dealing with sensitive information or not — makes the web a safer place for all of us.
Last, of course, we will look at how you can get started with Let’s Encrypt on your website. We’ll review the options available to you on common hosting providers, as well as walk through the steps for how you can set this up for yourself, if you have administrative access to your server.
If you already have Let’s Encrypt enabled on your site, this talk may be basic for you (although we’ll do a few cool demos that make for great party tricks, so feel free to stop by).
If you’ve never accessed your hosting provider’s website admin area (CPanel, Plesk, etc), this talk might be a bit hard for you to follow (although you should totally come and ask questions both during the presentation and after).
If you have a WordPress website and you’ve thought about enabling SSL on it but you just haven’t gotten around to it yet, this talk will be perfect for you. By the end of this presentation, you should not only know how to enable encryption on your website, but you will understand why it’s so important that you do.
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SSH (Secure Shell) is a protocol that allows secure remote access and file transfers over unsecured networks. It uses encryption and authentication to provide security. SSH clients connect to SSH servers to remotely control servers and transfer files securely. It protects confidentiality with encryption, integrity with message authentication codes and hashes, and authentication with digital proofs of identity.
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HTTPS is a protocol that combines HTTP with SSL/TLS encryption to provide secure communication between a client and server. It encrypts data sent between a browser and website using a public/private key system. When a client requests an HTTPS connection, the website sends its SSL certificate containing a public key. This begins the SSL handshake where shared secrets are generated to uniquely encrypt the connection. HTTPS is important for securing sensitive communications and establishing trust, as it is used widely on banking, payment, shopping and email sites.
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SSH is a cryptographically protected remote login protocol that provides strong protection against password sniffing and spoofing attacks. When connecting to a server for the first time, the client has no way to verify the server's host key and will ask the user if they want to trust it. Encryption methods like AES and Blowfish can be used for encryption, with AES being the default, while older protocols like SSH-1 are still supported but less secure.
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PGP and SSH are encryption protocols that provide security for email and remote login services. PGP provides authentication, confidentiality, data integrity, and non-repudiation for email using public key encryption and a web-of-trust system to distribute keys. SSH was created as a secure replacement for insecure remote login programs, using strong authentication and encryption to protect remote access and login sessions from tampering or eavesdropping.
PKI and Applications
Public key infrastructure (PKI) uses public and private key cryptography and digital certificates to provide security services like authentication, non-repudiation, and data integrity. A PKI system uses certification authorities to validate users' identities and issue digital certificates that bind public keys to those identities. These certificates allow users to securely exchange information and digitally sign documents online through services like SSL/TLS and S/MIME. Smart cards can serve as portable devices for storing users' private keys and certificates to enable strong authentication on untrusted devices.
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This Presentation is all about the HTTP and HTTPS.Also the working of these two protocols is explained.
Digital Signatures
This document discusses digital signatures, including what they are, how they work, and why they are important. Digital signatures use public key cryptography to authenticate the identity of the sender and ensure the integrity of digital messages or documents. They generate a unique hash of the data, encrypt it with the sender's private key, and attach it to the message. Anyone can then decrypt the hash using the sender's public key and verify that the data has not been altered since signing. Digital signatures help ensure secure online transactions and detect forgery or tampering of digital information.
Http vs https
HTTP is the Hypertext Transfer Protocol that sets the standards for communication between web servers and browsers. It transmits data in plain text. HTTPS is the secure version of HTTP that encrypts data transmission using SSL/TLS encryption to securely transmit sensitive information and authenticate website identities. The main differences are that HTTPS operates over port 443, encrypts data transmission for security, and allows for verification of website identities through digital certificates.
Secure shell ppt
SSH is a protocol for secure remote access to a machine over untrusted networks.
SSH is a replacement for telnet, rsh, rlogin and can replace ftp.
Uses Encryption.
SSH is not a shell like Unix Bourne shell and C shell (wildcard expansion and command interpreter)
Https
HTTPS provides secure communication over the internet by authenticating websites and encrypting data transmission. It was created in 1994 as an evolution of the SSL protocol to add security to HTTP communications. While it operates at the application layer like HTTP, it encrypts messages before transmission using encryption at the sublayer level. Setting up a server for HTTPS requires obtaining a certificate from a certificate authority to verify a website's identity and encrypt connections from browsers.
Let's Encrypt! Wait. Why? How?
On December 3rd, 2015 (one day before the inaugural WordCamp USA) a service called Let’s Encrypt entered its public beta. Backed by several major sponsors (including Automattic), the service caught on quickly. As of summer 2016, more than 5 million SSL certificates had been issued by Let’s Encrypt, nearly four million of which were active and unexpired.
If you are not familiar, Let’s Encrypt is a free, automated, open certificate authority that allows users to encrypt the data flowing to and from their websites easily and for free. The goal of Let’s Encrypt is to make data transfer over the internet secure by default. Towards that end, they have invested a considerable amount of time and energy in making it easy for users of all stripes to secure the data flowing in and out of their websites.
You may have already considered encrypting your website before — perhaps to perform better in search engines, or to gain the ability to accept payments on your website. Regardless of whether you’ve considered enabling SSL on your website or not, the goal of this talk is to demonstrate why encryption on your website matters. We will look at some practical examples and live demos of what data can be stolen from your website, even if you using an encrypted wifi connection. Likewise, we’ll talk about how encryption of all websites — whether they’re dealing with sensitive information or not — makes the web a safer place for all of us.
Last, of course, we will look at how you can get started with Let’s Encrypt on your website. We’ll review the options available to you on common hosting providers, as well as walk through the steps for how you can set this up for yourself, if you have administrative access to your server.
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It sounds like an intimidating topic, but we can do this. Come on and let’s encrypt!
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https://www.facebook.com/MostafaElLathyIT
mostafa.it@hotmail.com
https://www.youtube.com/channel/UCAEiVvBP3DbIKUcoZBcaHvQ
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8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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Aleš Zamuda: Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapter and Networking.
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Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
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The ssh protocol
- 2. SSH is a protocol, not a product. It is a specification of how to conduct secure communication over a network. The SSH protocol covers authentication, encryption, and the integrity of data transmitted over a network.
- 3. Authentication Reliably determines someone’s identity. If you try to log into an account on a remote computer, SSH asks for digital proof of your identity. If you pass the test, you may log in; otherwise SSH rejects the connection.
- 4. Encryption Scrambles data so it is unintelligible except to the intended recipients. This protects your data as it passes over the network.
- 5. Integrity Guarantees the data traveling over the network arrives unaltered. If a third party captures and modifies your data in transit, SSH detects this fact.
- 6. Authentication, Encryption & Integrity Authentication “I am me” “I am me too” Encryption Integrity SSH Client SSH Server