cryptography.pptx
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Cryptography is a technique for secure communication that protects messages from third parties called adversaries. There are two main types of encryption: two-way encryption where a message can be encrypted and decrypted, and one-way encryption where a message can only be encrypted. Common encryption methods include shift ciphers, Caesar ciphers, block ciphers, hashing, and public/private key encryption. Cryptography has many applications including cryptocurrency, password security, military communication, and secure data transmission.
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Cryptography is the science of keeping communications secure through various encryption techniques. There are two main types: symmetric encryption which uses a shared secret key for encryption and decryption, and asymmetric encryption which uses a public/private key pair. Symmetric encryption is faster but more difficult to implement for multiple parties, while asymmetric encryption using algorithms like RSA enables easy key distribution and digital signatures.
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Cryptography involves mathematical techniques for secure communication in the presence of adversaries. There are two main types: secret key cryptography which uses a single key for encryption and decryption, and public key cryptography which uses separate public and private keys. Common cryptographic algorithms discussed include DES, Triple DES, IDEA, and AES, with AES now being the standard due to the insecurity of DES and the slowness of IDEA and Triple DES.
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Cryptography involves mathematical techniques for secure communication in the presence of adversaries. There are two main types: secret key cryptography which uses a single key for encryption and decryption, and public key cryptography which uses separate public and private keys. Common cryptographic algorithms discussed include DES, Triple DES, IDEA, and AES, with AES now being the standard due to the insecurity of DES and the slowness of IDEA and Triple DES.
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The document discusses various topics in cryptography including symmetric and asymmetric encryption algorithms. Symmetric algorithms like DES use a shared key for encryption and decryption while asymmetric algorithms like RSA use public-private key pairs. Digital signatures can be generated by encrypting a document hash with a private key and verified using the corresponding public key. Cryptography ensures security goals like confidentiality, integrity, authentication and non-repudiation of digital communications.
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Rainfall intensity duration frequency curve statistical analysis and modeling...
Using data from 41 years in Patna’ India’ the study’s goal is to analyze the trends of how often it rains on a weekly, seasonal, and annual basis (1981−2020). First, utilizing the intensity-duration-frequency (IDF) curve and the relationship by statistically analyzing rainfall’ the historical rainfall data set for Patna’ India’ during a 41 year period (1981−2020), was evaluated for its quality. Changes in the hydrologic cycle as a result of increased greenhouse gas emissions are expected to induce variations in the intensity, length, and frequency of precipitation events. One strategy to lessen vulnerability is to quantify probable changes and adapt to them. Techniques such as log-normal, normal, and Gumbel are used (EV-I). Distributions were created with durations of 1, 2, 3, 6, and 24 h and return times of 2, 5, 10, 25, and 100 years. There were also mathematical correlations discovered between rainfall and recurrence interval.
Findings: Based on findings, the Gumbel approach produced the highest intensity values, whereas the other approaches produced values that were close to each other. The data indicates that 461.9 mm of rain fell during the monsoon season’s 301st week. However, it was found that the 29th week had the greatest average rainfall, 92.6 mm. With 952.6 mm on average, the monsoon season saw the highest rainfall. Calculations revealed that the yearly rainfall averaged 1171.1 mm. Using Weibull’s method, the study was subsequently expanded to examine rainfall distribution at different recurrence intervals of 2, 5, 10, and 25 years. Rainfall and recurrence interval mathematical correlations were also developed. Further regression analysis revealed that short wave irrigation, wind direction, wind speed, pressure, relative humidity, and temperature all had a substantial influence on rainfall.
Originality and value: The results of the rainfall IDF curves can provide useful information to policymakers in making appropriate decisions in managing and minimizing floods in the study area.
Mechanical Engineering on AAI Summer Training Report-003.pdf
Mechanical Engineering PROJECT REPORT ON SUMMER VOCATIONAL TRAINING
AT MBB AIRPORT
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Unit-III-ELECTROCHEMICAL STORAGE DEVICES.ppt
Batteries -Introduction – Types of Batteries – discharging and charging of battery - characteristics of battery –battery rating- various tests on battery- – Primary battery: silver button cell- Secondary battery :Ni-Cd battery-modern battery: lithium ion battery-maintenance of batteries-choices of batteries for electric vehicle applications.
Fuel Cells: Introduction- importance and classification of fuel cells - description, principle, components, applications of fuel cells: H2-O2 fuel cell, alkaline fuel cell, molten carbonate fuel cell and direct methanol fuel cells.
Null Bangalore | Pentesters Approach to AWS IAM
#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
# Scenario Covered:
- Basics of IAM in AWS
- Implementing IAM Policies with Least Privilege to Manage S3 Bucket
- Objective: Create an S3 bucket with least privilege IAM policy and validate access.
- Steps:
- Create S3 bucket.
- Attach least privilege policy to IAM user.
- Validate access.
- Exploiting IAM PassRole Misconfiguration
-Allows a user to pass a specific IAM role to an AWS service (ec2), typically used for service access delegation. Then exploit PassRole Misconfiguration granting unauthorized access to sensitive resources.
- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
- An overly permissive IAM role configuration can lead to privilege escalation by creating a role with administrative privileges and allow a user to assume this role.
- Objective: Show how overly permissive IAM roles can lead to privilege escalation.
- Steps:
- Create role with administrative privileges.
- Allow user to assume the role.
- Perform administrative actions.
- Differentiation between PassRole vs AssumeRole
Try at [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
Advanced control scheme of doubly fed induction generator for wind turbine us...
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
IEEE Aerospace and Electronic Systems Society as a Graduate Student Member
IEEE Aerospace and Electronic Systems Society as a Graduate Student Member
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cryptography.pptx
- 2. What is Cryptography? Cryptography is technique for secure communication in the presence of third parties called adversaries.
- 3. Type of Encryption On basis of Algorithm – Two Way Encryption – One Way Encryption On basis of key type – Public Key Encryption – Private Key Encryption
- 4. Two Way Encryption Example: Message : ABC Caesar Cipher : DEF Decrypted Message : ABC
- 5. One Way Encryption Message Cipher Text Example: Message: ABC Encrypted (MD5 hash): 902FBDD2B1DF0C4F70B4A5D23525E932
- 6. Cipher – Shift Cipher Shift original message with n symbol – Caesar Cipher Shift original message with exactly 3 symbol – Block Cipher Exchange the original message with hash table
- 7. Salting – Salting is a method of crypto system. Where we mix one extra message known as salt message with the original message. Message Salt Message Encryption Algorithm
- 8. Steganography – It is the method of hiding message into a image.
- 9. Some Famous Cryptography Algorithm Crypto Function – Base 64 – SHA Algorithm – AES, DES Algorithm – RC6 Algorithm Hash function – Md5 – SHA128
- 10. Hybrid Cryptography – Using more then two crypto algorithm in a system is called hybrid cryptography Base64 Caesar Cipher Hybrid Algorithm
- 11. Major Application – Crypto Currency and Blockchain – Login Password Security’ – Military and secure areas – Secure communication (Ex: SSL)
- 12. Thank you