Internet Assigned Numbers Authority Messaging Layer Security (MLS) Created 2023-04-06 Last Updated 2023-08-24 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registries included below • MLS Cipher Suites • MLS Wire Formats • MLS Extension Types • MLS Proposal Types • MLS Credential Types • MLS Signature Labels • MLS Public Key Encryption Labels • MLS Exporter Labels MLS Cipher Suites Registration Procedure(s) Specification Required Expert(s) Sean Turner, Raphael Robert, Richard Barnes Reference [RFC9420] Note Registration requests should be sent to the mailing list described in [RFC9420, Section 17.9]. If approved, designated experts should notify IANA within three weeks. For assistance, please contact iana@iana.org. Available Formats [IMG] CSV Value Name Recommended Reference 0x0000 RESERVED - [RFC9420] 0x0001 MLS_128_DHKEMX25519_AES128GCM_SHA256_Ed25519 Y [RFC9420] 0x0002 MLS_128_DHKEMP256_AES128GCM_SHA256_P256 Y [RFC9420] 0x0003 MLS_128_DHKEMX25519_CHACHA20POLY1305_SHA256_Ed25519 Y [RFC9420] 0x0004 MLS_256_DHKEMX448_AES256GCM_SHA512_Ed448 Y [RFC9420] 0x0005 MLS_256_DHKEMP521_AES256GCM_SHA512_P521 Y [RFC9420] 0x0006 MLS_256_DHKEMX448_CHACHA20POLY1305_SHA512_Ed448 Y [RFC9420] 0x0007 MLS_256_DHKEMP384_AES256GCM_SHA384_P384 Y [RFC9420] 0x0A0A GREASE Y [RFC9420] 0x1A1A GREASE Y [RFC9420] 0x2A2A GREASE Y [RFC9420] 0x3A3A GREASE Y [RFC9420] 0x4A4A GREASE Y [RFC9420] 0x5A5A GREASE Y [RFC9420] 0x6A6A GREASE Y [RFC9420] 0x7A7A GREASE Y [RFC9420] 0x8A8A GREASE Y [RFC9420] 0x9A9A GREASE Y [RFC9420] 0xAAAA GREASE Y [RFC9420] 0xBABA GREASE Y [RFC9420] 0xCACA GREASE Y [RFC9420] 0xDADA GREASE Y [RFC9420] 0xEAEA GREASE Y [RFC9420] 0xF000-0xFFFF Reserved for Private Use - [RFC9420] MLS Wire Formats Registration Procedure(s) Specification Required Expert(s) Sean Turner, Raphael Robert, Richard Barnes Reference [RFC9420] Note Registration requests should be sent to the mailing list described in [RFC9420, Section 17.9]. If approved, designated experts should notify IANA within three weeks. For assistance, please contact iana@iana.org. Available Formats [IMG] CSV Value Name Recommended Reference 0x0000 RESERVED - [RFC9420] 0x0001 mls_public_message Y [RFC9420] 0x0002 mls_private_message Y [RFC9420] 0x0003 mls_welcome Y [RFC9420] 0x0004 mls_group_info Y [RFC9420] 0x0005 mls_key_package Y [RFC9420] 0x0006-0xEFFF Unassigned 0xF000-0xFFFF Reserved for Private Use - [RFC9420] MLS Extension Types Registration Procedure(s) Specification Required Expert(s) Sean Turner, Raphael Robert, Richard Barnes Reference [RFC9420] Note Registration requests should be sent to the mailing list described in [RFC9420, Section 17.9]. If approved, designated experts should notify IANA within three weeks. For assistance, please contact iana@iana.org. Available Formats [IMG] CSV Value Name Message(s) Recommended Reference 0x0000 RESERVED N/A - [RFC9420] 0x0001 application_id LN Y [RFC9420] 0x0002 ratchet_tree GI Y [RFC9420] 0x0003 required_capabilities GC Y [RFC9420] 0x0004 external_pub GI Y [RFC9420] 0x0005 external_senders GC Y [RFC9420] 0x0A0A GREASE KP, GI, LN Y [RFC9420] 0x1A1A GREASE KP, GI, LN Y [RFC9420] 0x2A2A GREASE KP, GI, LN Y [RFC9420] 0x3A3A GREASE KP, GI, LN Y [RFC9420] 0x4A4A GREASE KP, GI, LN Y [RFC9420] 0x5A5A GREASE KP, GI, LN Y [RFC9420] 0x6A6A GREASE KP, GI, LN Y [RFC9420] 0x7A7A GREASE KP, GI, LN Y [RFC9420] 0x8A8A GREASE KP, GI, LN Y [RFC9420] 0x9A9A GREASE KP, GI, LN Y [RFC9420] 0xAAAA GREASE KP, GI, LN Y [RFC9420] 0xBABA GREASE KP, GI, LN Y [RFC9420] 0xCACA GREASE KP, GI, LN Y [RFC9420] 0xDADA GREASE KP, GI, LN Y [RFC9420] 0xEAEA GREASE KP, GI, LN Y [RFC9420] 0xF000-0xFFFF Reserved for Private Use N/A - [RFC9420] MLS Proposal Types Registration Procedure(s) Specification Required Expert(s) Sean Turner, Raphael Robert, Richard Barnes Reference [RFC9420] Note Registration requests should be sent to the mailing list described in [RFC9420, Section 17.9]. If approved, designated experts should notify IANA within three weeks. For assistance, please contact iana@iana.org. Available Formats [IMG] CSV Value Name Recommended Ext Path Reference 0x0000 RESERVED - - - [RFC9420] 0x0001 add Y Y N [RFC9420] 0x0002 update Y N Y [RFC9420] 0x0003 remove Y Y Y [RFC9420] 0x0004 psk Y Y N [RFC9420] 0x0005 reinit Y Y N [RFC9420] 0x0006 external_init Y N Y [RFC9420] 0x0007 group_context_extensions Y Y Y [RFC9420] 0x0A0A GREASE Y - - [RFC9420] 0x1A1A GREASE Y - - [RFC9420] 0x2A2A GREASE Y - - [RFC9420] 0x3A3A GREASE Y - - [RFC9420] 0x4A4A GREASE Y - - [RFC9420] 0x5A5A GREASE Y - - [RFC9420] 0x6A6A GREASE Y - - [RFC9420] 0x7A7A GREASE Y - - [RFC9420] 0x8A8A GREASE Y - - [RFC9420] 0x9A9A GREASE Y - - [RFC9420] 0xAAAA GREASE Y - - [RFC9420] 0xBABA GREASE Y - - [RFC9420] 0xCACA GREASE Y - - [RFC9420] 0xDADA GREASE Y - - [RFC9420] 0xEAEA GREASE Y - - [RFC9420] 0xF000-0xFFFF Reserved for Private Use - - - [RFC9420] MLS Credential Types Registration Procedure(s) Specification Required Expert(s) Sean Turner, Raphael Robert, Richard Barnes Reference [RFC9420] Note Registration requests should be sent to the mailing list described in [RFC9420, Section 17.9]. If approved, designated experts should notify IANA within three weeks. For assistance, please contact iana@iana.org. Available Formats [IMG] CSV Value Name Recommended Reference 0x0000 RESERVED - [RFC9420] 0x0001 basic Y [RFC9420] 0x0002 x509 Y [RFC9420] 0x0A0A GREASE Y [RFC9420] 0x1A1A GREASE Y [RFC9420] 0x2A2A GREASE Y [RFC9420] 0x3A3A GREASE Y [RFC9420] 0x4A4A GREASE Y [RFC9420] 0x5A5A GREASE Y [RFC9420] 0x6A6A GREASE Y [RFC9420] 0x7A7A GREASE Y [RFC9420] 0x8A8A GREASE Y [RFC9420] 0x9A9A GREASE Y [RFC9420] 0xAAAA GREASE Y [RFC9420] 0xBABA GREASE Y [RFC9420] 0xCACA GREASE Y [RFC9420] 0xDADA GREASE Y [RFC9420] 0xEAEA GREASE Y [RFC9420] 0xF000-0xFFFF Reserved for Private Use - [RFC9420] MLS Signature Labels Registration Procedure(s) Specification Required Expert(s) Sean Turner, Raphael Robert, Richard Barnes Reference [RFC9420] Note Registration requests should be sent to the mailing list described in [RFC9420, Section 17.9]. If approved, designated experts should notify IANA within three weeks. For assistance, please contact iana@iana.org. Available Formats [IMG] CSV Label Recommended Reference "FramedContentTBS" Y [RFC9420] "LeafNodeTBS" Y [RFC9420] "KeyPackageTBS" Y [RFC9420] "GroupInfoTBS" Y [RFC9420] MLS Public Key Encryption Labels Registration Procedure(s) Specification Required Expert(s) Sean Turner, Raphael Robert, Richard Barnes Reference [RFC9420] Note Registration requests should be sent to the mailing list described in [RFC9420, Section 17.9]. If approved, designated experts should notify IANA within three weeks. For assistance, please contact iana@iana.org. Available Formats [IMG] CSV Label Recommended Reference "UpdatePathNode" Y [RFC9420] "Welcome" Y [RFC9420] MLS Exporter Labels Registration Procedure(s) Specification Required Expert(s) Sean Turner, Raphael Robert, Richard Barnes Reference [RFC9420] Note Registration requests should be sent to the mailing list described in [RFC9420, Section 17.9]. If approved, designated experts should notify IANA within three weeks. For assistance, please contact iana@iana.org. Label Recommended Reference No registrations at this time. Licensing Terms