Titlebook: Cryptography for Secure Encryption; Robert G. Underwood Textbook 2022 Springer Nature Switzerland AG 2022 automatic sequences.cryptography

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Digital Signature Schemes,In this chapter we show how public key cryptosystems can be used to create “digital” signatures.

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Key Generation,The Vernam cipher of Section . is the only cryptosystem that has perfect secrecy (Definition .), because the key is a random sequence of bits of the same length as the message (Proposition .).

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Key Distribution,AES and other symmetric key cryptosystems are in wide use because they transmit data much faster than public key cryptosystems (e.g., RSA), but they need a shared secret key. Moreover, the Blum–Micali and Blum–Blum–Shub bit generators require both Alice and Bob to share an initial key consisting of a finite string of random bits.

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https://doi.org/10.1007/978-3-030-97902-7automatic sequences; cryptography; cyber security; complexity theory; symmetric key cryptosystem; cryptan