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RFC 6528 - Defending against Sequence Number Attacks

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Defending against Sequence Number Attacks (RFC 6528, ; obsoleted by RFC 9293)

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RFC 6528: Defending against Sequence Number Attacks

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IETF Datatracker

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This document specifies an algorithm for the generation of TCP Initial Sequence Numbers (ISNs), such that the chances of an off-path attacker guessing the sequence numbers in use by a target connection are reduced. This document revises (and formally obsoletes) RFC 1948, and takes the ISN generation algorithm originally proposed in that document to Standards Track, formally updating RFC 793. [STANDARDS-TRACK]

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