🛠️ Invention or technique

Needham–Schroeder protocol

Protocolo de Needham-Schroeder

Date
1978 · confidence medium
Place
Cambridge, England, United Kingdom
Credited to
Michael Schroeder y Roger Needham
Field
Knowledge & symbols

What it is

Pioneering cryptographic protocols for establishing session keys and mutual authentication between two parties over an insecure network, devised by Roger Needham and Michael Schroeder and the basis of the later Kerberos protocol.

What it led to

  • The Kerberos network authentication protocol
  • Development of protocol cryptography and its formal verification
  • Later discovery of vulnerabilities (Lowe's attack, 1995) that spurred formal protocol analysis
  • Foundations of modern authentication in distributed networks
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Sources✓ verified 2026-09-28