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Erschienen in:
2013 | OriginalPaper | Buchkapitel
5. Message Authentication
verfasst von : José Luis Gómez Pardo
Erschienen in: Introduction to Cryptography with Maple
Verlag: Springer Berlin Heidelberg
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Abstract
Since ancient times, cryptography has been closely associated with providing confidentiality and so it is often implicitly or explicitly identified with the use of encryption and decryption. But, important as confidentiality is, modern cryptography goes far beyond this objective and message authentication and message integrity are perhaps even more important goals. In this chapter we will look at techniques that provide message integrity in the private-key setting, in which the honest parties share some secret key. These techniques will try to guarantee that any modification of the message will be detected by the honest parties.