rfc9576v2.txt   rfc9576.txt 
Internet Engineering Task Force (IETF) A. Davidson Internet Engineering Task Force (IETF) A. Davidson
Request for Comments: 9576 LIP Request for Comments: 9576 NOVA LINCS, Universidade NOVA de Lisboa
Category: Informational J. Iyengar Category: Informational J. Iyengar
ISSN: 2070-1721 Fastly ISSN: 2070-1721 Fastly
C. A. Wood C. A. Wood
Cloudflare Cloudflare
May 2024 June 2024
The Privacy Pass Architecture The Privacy Pass Architecture
Abstract Abstract
This document specifies the Privacy Pass architecture and This document specifies the Privacy Pass architecture and
requirements for its constituent protocols used for authorization requirements for its constituent protocols used for authorization
based on privacy-preserving authentication mechanisms. It describes based on privacy-preserving authentication mechanisms. It describes
the conceptual model of Privacy Pass and its protocols, its security the conceptual model of Privacy Pass and its protocols, its security
and privacy goals, practical deployment models, and recommendations and privacy goals, practical deployment models, and recommendations
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This document has no IANA actions. This document has no IANA actions.
9. References 9. References
9.1. Normative References 9.1. Normative References
[AUTHSCHEME] [AUTHSCHEME]
Pauly, T., Valdez, S., and C. A. Wood, "The Privacy Pass Pauly, T., Valdez, S., and C. A. Wood, "The Privacy Pass
HTTP Authentication Scheme", RFC 9577, HTTP Authentication Scheme", RFC 9577,
DOI 10.17487/RFC9577, May 2024, DOI 10.17487/RFC9577, June 2024,
<https://www.rfc-editor.org/info/rfc9577>. <https://www.rfc-editor.org/info/rfc9577>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997, DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>. <https://www.rfc-editor.org/info/rfc2119>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>. May 2017, <https://www.rfc-editor.org/info/rfc8174>.
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design.html>. design.html>.
[HIJK21] Huang, S., Iyengar, S., Jeyaraman, S., Kushwah, S., Lee, [HIJK21] Huang, S., Iyengar, S., Jeyaraman, S., Kushwah, S., Lee,
C-K., Luo, Z., Mohassel, P., Raghunathan, A., Shaikh, S., C-K., Luo, Z., Mohassel, P., Raghunathan, A., Shaikh, S.,
Sung, Y-C., and A. Zhang, "DIT: De-Identified Sung, Y-C., and A. Zhang, "DIT: De-Identified
Authenticated Telemetry at Scale", January 2021, Authenticated Telemetry at Scale", January 2021,
<https://research.fb.com/privatestats>. <https://research.fb.com/privatestats>.
[ISSUANCE] Celi, S., Davidson, A., Valdez, S., and C. A. Wood, [ISSUANCE] Celi, S., Davidson, A., Valdez, S., and C. A. Wood,
"Privacy Pass Issuance Protocols", RFC 9578, "Privacy Pass Issuance Protocols", RFC 9578,
DOI 10.17487/RFC9578, May 2024, DOI 10.17487/RFC9578, June 2024,
<https://www.rfc-editor.org/info/rfc9578>. <https://www.rfc-editor.org/info/rfc9578>.
[KLOR20] Kreuter, B., Lepoint, T., OrrĂ¹, M., Raykova, M., and [KLOR20] Kreuter, B., Lepoint, T., OrrĂ¹, M., Raykova, M., and
Springer International Publishing, "Anonymous Tokens with Springer International Publishing, "Anonymous Tokens with
Private Metadata Bit", Advances in Cryptology - CRYPTO Private Metadata Bit", Advances in Cryptology - CRYPTO
2020, pp. 308-336, DOI 10.1007/978-3-030-56784-2_11, 2020, 2020, pp. 308-336, DOI 10.1007/978-3-030-56784-2_11, 2020,
<https://doi.org/10.1007/978-3-030-56784-2_11>. <https://doi.org/10.1007/978-3-030-56784-2_11>.
[OHTTP] Thomson, M. and C. A. Wood, "Oblivious HTTP", RFC 9458, [OHTTP] Thomson, M. and C. A. Wood, "Oblivious HTTP", RFC 9458,
DOI 10.17487/RFC9458, January 2024, DOI 10.17487/RFC9458, January 2024,
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Acknowledgements Acknowledgements
The authors would like to thank Eric Kinnear, Scott Hendrickson, The authors would like to thank Eric Kinnear, Scott Hendrickson,
Tommy Pauly, Christopher Patton, Benjamin Schwartz, Martin Thomson, Tommy Pauly, Christopher Patton, Benjamin Schwartz, Martin Thomson,
Steven Valdez, and other contributors of the Privacy Pass Working Steven Valdez, and other contributors of the Privacy Pass Working
Group for many helpful contributions to this document. Group for many helpful contributions to this document.
Authors' Addresses Authors' Addresses
Alex Davidson Alex Davidson
LIP NOVA LINCS, Universidade NOVA de Lisboa
Lisbon Largo da Torre
Caparica
Portugal Portugal
Email: alex.davidson92@gmail.com Email: alex.davidson92@gmail.com
Jana Iyengar Jana Iyengar
Fastly Fastly
Email: jri@fastly.com Email: jri@fastly.com
Christopher A. Wood Christopher A. Wood
Cloudflare Cloudflare
101 Townsend St 101 Townsend St
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