matt�rsa.com

This write-up gives a complete in-depth derivation of the RSA algorithm, based on a proof for Euler's Theorem. The implementation of the algorithm in the PGP software written by Phil Zimmermann will be discussed, as well as the two other important algorithms used in PGP, IDEA and MD5. The last section provides a crash course in using PGP. 1 Introduction Public-key cryptography has recently become the focus of public attention as governments in and outside the U.S. try to regulate information flow on the Internet. What is public-key cryptography about? The following concise explanation from Phil Zimmermann can be found in [1] Pretty Good(tm) Privacy (PGP), from Phil's Pretty Good Software, is a high security cryptographic software application for MSDOS, Unix, VAX/VMS, and other computers. PGP allows people to exchange files or messages with privacy, authentication, and convenience. Privacy means that only those intended to receive a message can read it. Authentication means that messag...

and Keywords 4 1 Introduction 5 1.1 Overview of Network Security : : : : : : : : : : : : : : : : : : : : : : : : : 5 1.2 Open Systems Interconnection Security : : : : : : : : : : : : : : : : : : : 7 2 Encryption 9 2.1 Introduction : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 9 2.2 Symmetric Key Cryptosystems : : : : : : : : : : : : : : : : : : : : : : : : 9 2.3 Public-Key Cryptosystems : : : : : : : : : : : : : : : : : : : : : : : : : : 9 2.4 Common Encryption Protocols : : : : : : : : : : : : : : : : : : : : : : : : 10 2.4.1 Data Encryption Standard (DES) : : : : : : : : : : : : : : : : : : : 10 2.4.2 RSA Algorithm : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 11 2.5 Hash Functions and Message Digests : : : : : : : : : : : : : : : : : : : : : 11 2.6 Secure Electronic Mail : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 12 2.7 Current Developments : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 12 3 Security for...

Cryptography has increasing been considered or used in the Federal government to protect sensitive information and provide adequate security in its computers and telecommunication systems. This standard specifies a set of generic cryptographic service calls for application programs to request common cryptographic functions from a cryptographic module which provides these cryptographic capabilities. The service calls address both the secret-key based and the public-key based cryptographic algorithms. Cryptographic functions specified in this document include: message encryption and decryption, message authentication, digital signature generation and verification, key management, and user authentication. The standard interface is aimed to promote interoperability among different cryptographic implementations. Key words: computer security, cryptography, cryptographic Application Program Interface (cryptographic API), Federal Information Processing Standard (FIPS). DRAFT FIPS PUB XXX Pro...

this report aim to provide the missing protection by transforming a message into a form where if it were intercepted in transit, the contents of the original message could not be explicitly discovered. Such encrypted messages, when they reach their intended recipients, however, are capable of being transformed back into the original message.

this report, it is necessary to mention vendors and commercial products. The presence or absence of a particular trade name product does not imply criticism or endorsement by the National Institute of Standards and Technology, nor does it imply that the products identified are necessarily the best available