• Johannes A. Buchmann
Part of the Undergraduate Texts in Mathematics book series (UTM)


The traditional topic of cryptography is encryption. Encryption schemes are used to keep messages or stored data secret. In this chapter, we introduce fundamental notions that we need to describe encryption schemes. As a first example, we present affine linear ciphers and their cryptanalysis.


Block Cipher Block Length Stream Cipher Encryption Function Decryption Function 
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Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • Johannes A. Buchmann
    • 1
  1. 1.Department of Computer ScienceTechnical UniversityDarmstadtGermany

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