# Cryptography **Domain:** Information Security / Mathematics / Computing History **Doc Type:** Field **Maturity:** Developed **Related:** [[Enigma]], [[Bombe]], [[Alan Turing]], [[Gordon Welchman]], [[Cybersecurity]], [[Information Theory]], [[Operational Logic]], [[wiki/Bauhaus Architects of AI|Bauhaus Architects of AI]] ## Definition **Cryptography** is the design and analysis of methods that protect information by transforming it under explicit rules and controlled secrets. Its central concerns include confidentiality, integrity, authenticity and non-repudiation. Cryptanalysis studies how such protections fail or can be defeated. Cryptography should not be reduced to secrecy alone. Modern systems use it to establish identity, verify that information has not been altered, authorize action and coordinate trust across machines that do not otherwise share a secure environment. ## From Mechanism to Computation The history of cryptography is also part of the history of machine intelligence. [[Enigma]] embodied a changing cipher state in electromechanical hardware. The British [[Bombe]] converted knowledge about that mechanism, probable plaintext and logical incompatibility into a systematic search process. [[Alan Turing]] contributed the cryptanalytic method; [[Gordon Welchman]]'s [[Diagonal Board]] greatly strengthened the machine's ability to propagate constraints. This is a precise computational lineage, but not a [[Gödelian Analogy|Gödelian]] one. Enigma was stateful without being self-referential, and the Bombe performed constrained search without possessing a self-model. The distinction matters wherever historical machines are used as analogies for later cognition. ## Machine-Intelligence Context Contemporary cryptography supplies the trust substrate for distributed machine intelligence. Authentication identifies actors and services; signatures bind claims to keys; secure channels preserve exchanges; hashes and commitments make state changes auditable. These mechanisms do not determine whether a system is truthful or just, but they make provenance, delegated authority and accountable coordination technically expressible. The field therefore connects [[Cybersecurity]] to [[Infrastructure as Governance]]: whoever controls keys, certificate authorities, identity systems and protocol standards can shape which actors are recognized and which actions count as valid. ## Bauhaus Architects Context [[articles/Bauhaus Architects of AI|Bauhaus Architects of AI]] uses Enigma and the Bombe as a disciplined contrast between stateful machinery, constraint propagation and genuine self-reference. The connection to the article's larger architecture is one of [[Structural Isomorphism]] and technical lineage, not evidence that wartime cryptanalysis directly transmitted Gödel's theorem into computer engineering. ## Backlinks - [[wiki/Bauhaus Architects of AI|Bauhaus Architects of AI]] - [[articles/Bauhaus Architects of AI|Bauhaus Architects of AI]] - [[Enigma]] - [[Cybersecurity]] ## Sources / Further Reading - [Bletchley Park — The Bombe](https://bletchleypark.org.uk/our-story/the-bombe/) - [NIST — Cryptographic Standards and Guidelines](https://csrc.nist.gov/projects/cryptographic-standards-and-guidelines)