Minimal IP Encapsulating Security Payload (ESP)
RFC 9333

Received changes through RFC Editor sync (created alias RFC 9333, changed abstract to 'This document describes the minimal properties that an IP Encapsulating Security Payload (ESP) implementation needs to meet to remain interoperable with the standard ESP as defined in RFC 4303. Such a minimal version of ESP is not intended to become a replacement of ESP in RFC 4303. Instead, a minimal implementation is expected to be optimized for constrained environments while remaining interoperable with implementations of ESP. In addition, this document provides some considerations for implementing minimal ESP in a constrained environment, such as limiting the number of flash writes, handling frequent wakeup and sleep states, limiting wakeup time, and reducing the use of random generation.

This document does not update or modify RFC 4303. It provides a compact description of how to implement the minimal version of that protocol. RFC 4303 remains the authoritative description.', changed pages to 13, changed standardization level to Informational, changed state to RFC, added RFC published event at 2023-01-13, changed IESG state to RFC Published)