Internet Assigned Numbers Authority

Privacy Pass

Created
2023-11-17
Last Updated
2024-07-12
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Registry included below

Privacy Pass Token Types

Registration Procedure(s)
Specification Required
Expert(s)
Tommy Pauly, Chris Wood
Reference
[RFC9577]
Available Formats

CSV
Value Name Token Structure Token Key Encoding TokenChallenge Structure Publicly Verifiable Public Metadata Private Metadata Nk Nid Change Controller Reference Notes
0x0000 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x0001 VOPRF(P-384, SHA-384) As defined in Section 2.2 of [RFC9577]. Serialized using SerializeElement (Section 2.1 of [RFC9497]). As defined in Section 2.1 of [RFC9577]. N N N 48 32 IETF [RFC9578, Section 5]
0x0002 Blind RSA (2048-bit) As defined in Section 2.2 of [RFC9577]. Serialized as a DER-encoded SubjectPublicKeyInfo (SPKI) object using the RSASSA-PSS OID [RFC5756]. As defined in Section 2.1 of [RFC9577]. Y N N 256 32 IETF [RFC9578, Section 6] The RSABSSA-SHA384-PSS-Deterministic and RSABSSA-SHA384-PSSZERO-Deterministic variants are supported.
0x0003-0x02A9 Unassigned
0x02AA RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x02AB-0x1131 Unassigned
0x1132 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x1133-0x2E95 Unassigned
0x2E96 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x2E97-0x3CD2 Unassigned
0x3CD3 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x3CD4-0x4472 Unassigned
0x4473 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x4474-0x5A62 Unassigned
0x5A63 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x5A64-0x6D31 Unassigned
0x6D32 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x6D33-0x7F3E Unassigned
0x7F3F RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x7F40-0x8D06 Unassigned
0x8D07 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x8D08-0x916A Unassigned
0x916B RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0x916C-0xA6A3 Unassigned
0xA6A4 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0xA6A5-0xBEAA Unassigned
0xBEAB RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0xBEAC-0xC3F2 Unassigned
0xC3F3 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0xC3F4-0xDA41 Unassigned
0xDA42 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0xDA43-0xE943 Unassigned
0xE944 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0xE945-0xF056 Unassigned
0xF057 RESERVED Random bytes Random bytes Random bytes N/A N/A N/A N/A N/A IETF [RFC9577]
0xF058-0xFFFF Unassigned