Abstract
The basic description of a block cipher is shown in Figure 13.1. Block ciphers operate on blocks of plaintext one at a time to produce blocks of ciphertext. The block of plaintext and the block of ciphertext are assumed to be of the same size, e.g. a block of n bits. Every string of n bits in the domain should map to a string of n bits in the codomain, and every string of n bits in the codomain should result from the application of the function to a string in the domain. This means that for a fixed key a block cipher is bijective and hence is a permutation.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Author information
Authors and Affiliations
Rights and permissions
Copyright information
© 2016 Springer International Publishing Switzerland
About this chapter
Cite this chapter
Smart, N.P. (2016). Block Ciphers and Modes of Operation. In: Cryptography Made Simple. Information Security and Cryptography. Springer, Cham. https://doi.org/10.1007/978-3-319-21936-3_13
Download citation
DOI: https://doi.org/10.1007/978-3-319-21936-3_13
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-21935-6
Online ISBN: 978-3-319-21936-3
eBook Packages: Computer ScienceComputer Science (R0)