This document discusses the concept of "simple" and "easy" as it relates to programming languages and Clojure in particular. It explores the differences between concepts that are simple versus complex, and easy versus hard. It provides examples of how Clojure aims to make programming simple by avoiding unnecessary complexity through choices like immutable data and avoiding side effects.
Elliptic Curve Cryptography and Zero Knowledge ProofArunanand Ta
Elliptic Curve Cryptography and Zero Knowledge Proof
Presentation by Nimish Joseph, at College of Engineering Cherthala, Kerala, India, during Faculty Development Program, on 06-Nov-2013
This document discusses the concept of "simple" and "easy" as it relates to programming languages and Clojure in particular. It explores the differences between concepts that are simple versus complex, and easy versus hard. It provides examples of how Clojure aims to make programming simple by avoiding unnecessary complexity through choices like immutable data and avoiding side effects.
Elliptic Curve Cryptography and Zero Knowledge ProofArunanand Ta
Elliptic Curve Cryptography and Zero Knowledge Proof
Presentation by Nimish Joseph, at College of Engineering Cherthala, Kerala, India, during Faculty Development Program, on 06-Nov-2013
Elliptic Curve Cryptography for those who are afraid of mathsMartijn Grooten
A low level introduction into elliptic curve cryptography, as presented at BSides San Francisco 2016.
NB don't be put off by the 100 slides; every transition is on its own slide.
1. The document discusses public key cryptography concepts like Diffie-Hellman key exchange, finite fields, discrete logarithm problems, key encapsulation mechanisms, and the security properties of IND-CCA security.
2. It provides examples of finite field arithmetic and constructions of finite fields and explains how fields can be extended.
3. The document compares public key cryptography and common key cryptography, noting that public key cryptography allows each user to have a single private key regardless of the number of users.
Public key cryptography uses two mathematically related keys, a public key and a private key, to encrypt and decrypt messages. The public key is used to encrypt messages and can be shared widely, while the private key is used to decrypt messages and must be kept secret by the recipient. Some applications of public key cryptography include digital signatures to authenticate senders and encrypting messages so that only the intended private key holder can decrypt them. The document then provides examples of cases where law enforcement has sought access to encrypted data for investigations.
Distributed Caching Using the JCACHE API and ehcache, Including a Case Study ...elliando dias
This document summarizes a presentation on distributed caching using the JCACHE API and ehcache. The presentation covers how to use ehcache to cache web pages, database queries, and configure distributed caching across multiple servers. It also discusses the JSR 107 JCACHE specification and its implementation in ehcache. The presentation concludes with a case study of caching at Wotif.com.
A SURVEY ON ELLIPTIC CURVE DIGITAL SIGNATURE ALGORITHM AND ITS VARIANTScsandit
The Elliptic Curve Digital Signature Algorithm (ECDSA) is an elliptic curve variant of the
Digital Signature Algorithm (DSA). It gives cryptographically strong digital signatures making
use of Elliptic curve discrete logarithmic problem. It uses arithmetic with much smaller
numbers 160/256 bits instead of 1024/2048 bits in RSA and DSA and provides the same level of
security. The ECDSA was accepted in 1999 as an ANSI standard, and was accepted in 2000 as
IEEE and NIST standards. It was also accepted in 1998 as an ISO standard. Many cryptologist
have studied security aspects of ECDSA and proposed different variants. In this paper, we
discuss a detailed analysis of the original ECDSA and all its available variants in terms of the
security level and execution time of all the phases. To the best of our knowledge, this is a unique
attempt to juxtapose and compare the ECDSA with all of its variants.
Caesar Cipher , Substitution Cipher, PlayFair and Vigenere CipherMona Rajput
The document provides information on various historical cryptosystems and ciphers, beginning with a brief overview of symmetric and asymmetric key encryption. It then discusses several manual ciphers such as the Caesar cipher, simple substitution cipher, Playfair cipher, and Vigenere cipher. The Caesar cipher performs monoalphabetic substitution by shifting letters of the alphabet. The simple substitution cipher and Playfair cipher improve security by using permutation or paired letter substitution instead of just shifting. The Vigenere cipher further enhances security by applying multiple Caesar shifts using a keyword. The document also covers the one-time pad cipher and its information theoretic security if the pad is truly random and never reused.
Elliptic Curve Cryptography for those who are afraid of mathsMartijn Grooten
A low level introduction into elliptic curve cryptography, as presented at BSides San Francisco 2016.
NB don't be put off by the 100 slides; every transition is on its own slide.
1. The document discusses public key cryptography concepts like Diffie-Hellman key exchange, finite fields, discrete logarithm problems, key encapsulation mechanisms, and the security properties of IND-CCA security.
2. It provides examples of finite field arithmetic and constructions of finite fields and explains how fields can be extended.
3. The document compares public key cryptography and common key cryptography, noting that public key cryptography allows each user to have a single private key regardless of the number of users.
Public key cryptography uses two mathematically related keys, a public key and a private key, to encrypt and decrypt messages. The public key is used to encrypt messages and can be shared widely, while the private key is used to decrypt messages and must be kept secret by the recipient. Some applications of public key cryptography include digital signatures to authenticate senders and encrypting messages so that only the intended private key holder can decrypt them. The document then provides examples of cases where law enforcement has sought access to encrypted data for investigations.
Distributed Caching Using the JCACHE API and ehcache, Including a Case Study ...elliando dias
This document summarizes a presentation on distributed caching using the JCACHE API and ehcache. The presentation covers how to use ehcache to cache web pages, database queries, and configure distributed caching across multiple servers. It also discusses the JSR 107 JCACHE specification and its implementation in ehcache. The presentation concludes with a case study of caching at Wotif.com.
A SURVEY ON ELLIPTIC CURVE DIGITAL SIGNATURE ALGORITHM AND ITS VARIANTScsandit
The Elliptic Curve Digital Signature Algorithm (ECDSA) is an elliptic curve variant of the
Digital Signature Algorithm (DSA). It gives cryptographically strong digital signatures making
use of Elliptic curve discrete logarithmic problem. It uses arithmetic with much smaller
numbers 160/256 bits instead of 1024/2048 bits in RSA and DSA and provides the same level of
security. The ECDSA was accepted in 1999 as an ANSI standard, and was accepted in 2000 as
IEEE and NIST standards. It was also accepted in 1998 as an ISO standard. Many cryptologist
have studied security aspects of ECDSA and proposed different variants. In this paper, we
discuss a detailed analysis of the original ECDSA and all its available variants in terms of the
security level and execution time of all the phases. To the best of our knowledge, this is a unique
attempt to juxtapose and compare the ECDSA with all of its variants.
Caesar Cipher , Substitution Cipher, PlayFair and Vigenere CipherMona Rajput
The document provides information on various historical cryptosystems and ciphers, beginning with a brief overview of symmetric and asymmetric key encryption. It then discusses several manual ciphers such as the Caesar cipher, simple substitution cipher, Playfair cipher, and Vigenere cipher. The Caesar cipher performs monoalphabetic substitution by shifting letters of the alphabet. The simple substitution cipher and Playfair cipher improve security by using permutation or paired letter substitution instead of just shifting. The Vigenere cipher further enhances security by applying multiple Caesar shifts using a keyword. The document also covers the one-time pad cipher and its information theoretic security if the pad is truly random and never reused.