This paper presents a tutorial introduction to contemporary cryptography. The basic information theoretic and computational properties of classical and modern cryptographic systems are presented, followed by cryptanalytic examination of several important systems and an examination of the application of cryptography to the security of timesharing systems and computer networks. The paper concludes with a guide to the cryptographic literature.

/pdf/privacy-and-authentication-an-introduction-to-cryptography-17y222fmkg.pdf

Privacy and authentication: An introduction to cryptography

In the paper some of the cryptographic techniques, algorithms and applications in computer networks are reviewed. Symmetric and asymmetric cryptosystems, possible cryptanalytical attacks, cryptosecurity and the relevance of complexity theory to the security of ciphers are described. The major threats and counter-measures in computer-network communications are outlined. Finally, cryptographic applications and limitations in computer networks are examined.

Cryptographic techniques and network security

Report discusses key generation for transmission of confidential data. A number of feedback functions are discussed for generation of long key sequences.

https://ntrs.nasa.gov/api/citations/19750000278/downloads/19750000278.pdf

Generation of key in cryptographic system for secure communications

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Generation of key in cryptographic system for secure communications