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Christian Amsüss, John Preuß Mattsson, Göran Selander
This document specifies enhancements to the Constrained Application Protocol
(CoAP) that mitigate security issues in particular use cases. The Echo option enables
a CoAP server to verify the freshness of a request or to force a client to
demonstrate reachability at its claimed network address. The Request-Tag option
allows the CoAP server to match block-wise message fragments belonging to the same
request. This document updates RFC 7252 with respect to the following: processing
requirements for client Tokens, forbidding non-secure reuse of Tokens to ensure response-to-request binding when CoAP is used with a security protocol, and
amplification mitigation (where the use of the Echo option is now recommended).
RFC 9175: Constrained Application Protocol (CoAP): Echo, Request-Tag, and Token Processing
2022-02-24T13:20:59+08:00
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2022-02-24T13:21:02-08:00
2022-02-24T13:21:02-08:00
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