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Ciphers for spies

2001
A spy operating in country X on behalf of country Y has the problem of communicating with his controller in such a way as to protect both himself and the contents of his messages. No matter how he sends his messages they will have to be ‘modified’ somehow so that their true meaning is hidden from anyone but the intended recipient.
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FASTA - A Stream Cipher for Fast FHE Evaluation

The Cryptographer's Track at RSA Conference, 2022
C. Cid, John Petter Indrøy, H. Raddum
semanticscholar   +1 more source

Block ciphers

2009
A block cipher typically operates on a plaintext which is broken into separate blocks of fixed length. The cipher maps an n bit plaintext to an n bit ciphertext, using a secret key of some fixed size; the mapping function must be invertible, so decryption is accomplished by simply applying the inverse map to the ciphertext.
Pantelimon Stanica, Thomas W. Cusick
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THE CYLINDER-CIPHER

Cryptologia, 1995
Questions Thomas Jefferson's attributed invention of the “cylinder cipher,” notes similar devices before and after his time, and introduces a “mystery device” of this nature in the National Cryptologic Museum, Fort George G. Meade MD.
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Introduction – A Revolutionary Cipher

2013
Cryptology is the science of secret writing. It is made up of two halves; cryptography consists of the techniques for creating systems of secret writing and cryptanalysis encompasses the techniques of breaking them. Over the past 2,500 years, cryptology has developed numerous types of systems to hide messages and subsequently a rich vocabulary in which
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Codes, not ciphers

The Mathematical Gazette, 2010
This article is written as a companion piece to the recent account of cryptography in [1]. The aim will be similar—to explain the meaning and principles of coding, give some implementations that are feasible at school and early undergraduate level, and give a flavour of the types of mathematics involved.2.
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The Cipher and Empire

2017
It is September 2009 and the start of a new semester. Students have gathered for the first meeting of my New Politics, New Possibilities class at Cornish College of the Arts in Seattle, Washington. We are seated around a table and are going through the syllabus.
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Ciphers of Transcendence

Eckhart Review, 2003
(2003). Ciphers of Transcendence. Eckhart Review: Vol. 12, Papers and talks given at the Fifteenth Conftrence of the Eckhart Society, held at Plater College, Oxford, England, 23-25 August 2002, pp. 39-52.
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