[Technical Errata Reported] RFC9729 (8843)

The following errata report has been submitted for RFC9729,
"The Concealed HTTP Authentication Scheme".

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You may review the report below and at:
https://www.rfc-editor.org/errata/eid8843

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Type: Technical
Reported by: Yixin Sun <yixins@virginia.edu>

Section: 4

Original Text
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concealed-integer-param-value =  %x31-39 1*4( DIGIT ) / "0"

Corrected Text
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concealed-integer-param-value =  %x31-39 *4( DIGIT ) / "0"

Notes
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The original ABNF syntax requires at least two digits (or "0"), excluding 1-9. Updating this to be compatible with the integer parameter descriptions, i.e., the "s" parameter that goes in the range of 0-65535. 

This should not cause any problems in current implementations as the bigger 0x0000-0x0200 range is reserved for backward compatibility (see IANA "TLS SignatureScheme" registry https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-signaturescheme), but it will still be good to fix the syntax.

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RFC9729 (draft-ietf-httpbis-unprompted-auth-12)
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Title               : The Concealed HTTP Authentication Scheme
Publication Date    : February 2025
Author(s)           : D. Schinazi, D. Oliver, J. Hoyland
Category            : PROPOSED STANDARD
Source              : HTTP
Stream              : IETF
Verifying Party     : IESG

Received on Wednesday, 18 March 2026 13:07:58 UTC