1. Introduction Authentication requirements of computing systems and networking protocols vary within very wide limits. Passwords that are vulnerable to attack a passive type, can not meet the requirements of modern Internet CERT94. And in addition to passive attacks in a network environment nearly always taken active methods Bellovin89, Bellovin92, Bellovin93, CB94, Stoll90. 2. Definitions and terminology used herein active attacks. Trying to incorrect modification data for authentication or authorization by inserting false packets into the data stream, or derivatives thereof.
Asymmetric cryptography. Cryptographic system that uses different keys for encryption and decryption. These two keys are mathematically related. Also called public key cryptography. Authentication.