Cited by 759Cryptography and Data SecurityAdvanced Authentication Protocols SecurityCoding theory and cryptography

Secure communications over insecure channels

Open access
Merkle, Ralph C.·1978·Communications of the ACM

Abstract

According to traditional conceptions of cryptographic security, it is necessary to transmit a key, by secret means, before encrypted massages can be sent securely. This paper shows that it is possible to select a key over open communications channels in such a fashion that communications security can be maintained. A method is described which forces any enemy to expend an amount of work which increases as the square of the work required of the two communicants to select the key. The method provides a logically new kind of protection against the passive eavesdropper. It suggests that further research on this topic will be highly rewarding, both in a theoretical and a practical sense.

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Crossref · 10.1145/359460.359473

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  • SSI has its privacy roots in the 1970s by the introduction of the Diffie-Hellman key-exchange protocol that allows users to protect their privacy in the digital environment using public key cryptography.

    “it has its privacy roots in the 1970s by the introduction of Diffie-Hellman k ey-exchange p rotocol t hat a llows u sers protect their privacy in the digital environment using public key cryptography [64].”

    From A Survey of Self-Sovereign Identity Ecosystem (2021) · cites this paper as [64]

    The Introduction and Abstract describe selecting a key over an open channel while keeping communications secure. The Addenda cite Diffie and Hellman's 1976 paper and relate Merkle's own puzzle method to public-key cryptography, but do not identify that method as the Diffie–Hellman key-exchange protocol or discuss SSI's privacy roots. (LLM, conf=0.85)

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Cites

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Research works printed but not linked: 1

  1. Merkle, R., and Hellman, M. Hiding information and receipts in trap door knapsacks. To appear, IEEE Trans. on Inform.

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Authors
Merkle, R. C.
Affiliations
University of California, Berkeley (US)
Corresponding author
Merkle, Ralph C.
Venue
Communications of the ACM
Published
1978-04
Volume
21
Issue
4
Pages
294-299
ISSN
  • 0001-0782 (ISSN-L)
  • 1557-7317
OpenAlex
W2047925852
Cited by
757
References
7
Citations by year
2026: 11 · 2025: 20 · 2024: 35 · 2023: 26 · 2022: 31 · 2021: 38 · 2020: 45 · 2019: 25 · 2018: 27 · 2017: 22 · 2016: 49 · 2015: 13 · 2014: 17 · 2013: 27 · 2012: 18
FWCI
10.92
Type
journal article
Language
en
Open access
Locations
Communications of the ACM (publishedVersion)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Cryptography and Data Security
  • Physical Sciences › Computer Science › Computer Networks and Communications › Advanced Authentication Protocols Security
  • Physical Sciences › Computer Science › Artificial Intelligence › Coding theory and cryptography
Keywords
key establishment, secure communication, eavesdropping, passive attacks, cryptographic security, computational complexity

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