A cryptography primer : secrets and promises /
Klein, Philip N.,author.
Includes bibliographical references (page 171) and index.
Introduction -- Modular arithmetic -- The addition cypher, an insecure block cypher -- Functions -- Probability theory -- Perfect secrecy and perfectly secure cryptosystems -- Number theory -- Euclid's algorithm -- Some uses of perfect secrecy --  Computational problems, easy and hard -- Modular exponentiation, modular logarithm, and one-way functions -- Diffie and Hellman's exponential-key-agreement protocol -- Computationally secure single-key cryptosystems -- Public-key cryptosystems and digital signatures.
Computer security.
Data encryption (Computer science)
Digital signatures.
Telecommunication