Communication Theory of Secrecy Systems.

Shannon, C. E. (1949). Communication Theory of Secrecy Systems. Bell System Technical Journal, 28(4), 656-715.

Type

Journal article

Intellectual base

Primary research

Year

1949

Volume

28

Issue

4

Pages

656-715

ISSN

1538-7305

DOI

10.1002/j.1538-7305.1949.tb00928.x

DOI registrant

Institute of Electrical and Electronics Engineers

Link

https://doi.org/10.1002/j.1538-7305.1949.tb00928.x

Cited from

information_theory, mathematics

Cited by

4 citations across 4 artifacts.

Each citation links to the sentence it supports in the citing article.

Primes

• Conditional Entropy
  • Shannon's secrecy theory formulated perfect secrecy by requiring that the cryptogram not reduce the message uncertainty, while possession of the key can collapse the remaining uncertainty.
• Statistical Independence
  • Causal inference and experimental design: randomization is the intervention that manufactures independence between treatment and confounders, which is what makes the resulting comparison interpretable. Cryptography and information theory: secrecy is the demand that ciphertext be statistically independent of plaintext given no key; mutual information measures the gap from independence.

    This sourceDefines perfect secrecy as statistical independence of ciphertext from plaintext, with mutual information measuring the gap.

Domain-specific

• Kerckhoffs's principle
  • Claude Shannon later restated it as "the enemy knows the system,"

    Supported in partVerified against the source

    Read by an automated reader; not a human review. How support was checked

• Quantum key distribution
  • … and measurement model, authenticated classical channel, sampling, error threshold, finite-key analysis, device assumptions, leakage accounting, and composable security claim are explicit. to An applied instance preserves the same invariant under a changed scale, notation, jurisdiction, dataset, or implementation..

Verification

Does it exist? Confirmed. This work's DOI resolves to a registered record, which fixes its identity. That is all it fixes.

Does it back the claim? Read against the text for 1 of 4 citations: 1 supported in part. Each verdict is shown under its citation below, with what in the work backs the sentence.

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Registry ID ref:0cdcfa929120 · see in the full table