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Challenge and Response with 1-Wire® SHA Devices


关键词: challenge-response, challenge, random challenge, response, SHA, SHA-1, MAC, coprocessor, user, access control, authentication, ecash, web access, random number generator, DS1963S, DS1961S, DS2432, software piracy 


Abstract: Challenge-response can be a secure way of protecting access to any privileged material if implemented correctly. In this document, many options for challenge-response access control are discussed but the most secure method given is presenting a different random challenge on each access attempt and having a response that only the host can interpret without giving out any secrets. This document shows why Maxim’s SHA-1 iButtons® and 1-Wire devices are ideal choices when implementing this kind of challenge-response system. 


 Challenge and Response with 1-Wire® SHA Devices.pdf