| Internet-Draft | COSE Kyber | November 2022 |
| Steele | Expires 17 May 2023 | [Page] |
This specification defines how to represent cryptographic keys for Kyber, an IND-CCA2-secure key encapsulation mechanism (KEM), for use with the key representation formats of JSON Web Key (JWK) and COSE (COSE_Key).¶
This note is to be removed before publishing as an RFC.¶
Status information for this document may be found at https://datatracker.ietf.org/doc/draft-steele-cose-kyber/.¶
Discussion of this document takes place on the cose Working Group mailing list (mailto:cose@ietf.org), which is archived at https://mailarchive.ietf.org/arch/browse/cose/. Subscribe at https://www.ietf.org/mailman/listinfo/cose/.¶
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Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.¶
Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."¶
This Internet-Draft will expire on 17 May 2023.¶
Copyright (c) 2022 IETF Trust and the persons identified as the document authors. All rights reserved.¶
This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License.¶
TODO Introduction¶
For additional details regarding kyber see pq-crystals.org/kyber.¶
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.¶
The following definitions apply to the lattice based key encapsulation mechanism known as Kyber.¶
When expressing a cryptographic key for these lattices in JSON Web Key (JWK) form, the following rules apply:¶
| kty | lat |
|---|---|
| OKP | Kyber-1024 |
| OKP | Kyber-768 |
| OKP | Kyber-512 |
TODO Security¶
TODO Test Vectors¶
{
"kty": "OKP",
"lat": "Kyber-1024",
"x":\
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}
¶
json
{
"kty": "OKP",
"lat": "Kyber-1024",
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}
¶
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¶
This specification establishes the IANA "JSON Web Key Lattice" registry for values of the JWK "lat" (algorithm) parameters.¶
This section establishes the IANA "JSON Web Key Lattice" registry for JWK "lat" member values. The registry records the lattice name, implementation requirements, and a reference to the specification that defines it. This specification registers the parameter names defined in Section 2.1.2.¶
The implementation requirements of a lattice may be changed over time as the cryptographic landscape evolves, for instance, to change the status of a lattice to Deprecated or to change the status of a lattice from Optional to Recommended+ or Required. Changes of implementation requirements are only permitted on a Specification Required basis after review by the Designated Experts, with the new specification defining the revised implementation requirements level.¶
The name requested (e.g., "Kyber-768"). Because a core goal of this specification is for the resulting representations to be compact, it is RECOMMENDED that the name be short -- not to exceed 8 characters without a compelling reason to do so. This name is case sensitive. Names may not match other registered names in a case-insensitive manner unless the Designated Experts state that there is a compelling reason to allow an exception.¶
Brief description of the lattice (e.g., "Kyber-768 Lattice").¶
The lattice implementation requirements for JWS and JWE, which must be one the words Required, Recommended, Optional, Deprecated, or Prohibited. Optionally, the word can be followed by a "+" or "-". The use of "+" indicates that the requirement strength is likely to be increased in a future version of the specification. The use of "-" indicates that the requirement strength is likely to be decreased in a future version of the specification.¶
For Standards Track RFCs, list "IESG". For others, give the name of the responsible party. Other details (e.g., postal address, email address, home page URI) may also be included.¶
Reference to the document or documents that specify the parameter, preferably including URIs that can be used to retrieve copies of the documents. An indication of the relevant sections may also be included but is not required.¶
TODO acknowledge.¶