Elliptic Curve-Based Certificateless Signatures for Identity-Based Encryption (ECCSI)
RFC 6507
Document | Type |
RFC - Informational
(February 2012; No errata)
Was draft-groves-eccsi (individual in sec area)
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Author | Michael Groves | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6507 (Informational) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Sean Turner | ||
IESG note | Tim Polk (tim.polk@nist.gov) is the shepherd. | ||
Send notices to | tim.polk@nist.gov |
Internet Engineering Task Force (IETF) M. Groves Request for Comments: 6507 CESG Category: Informational February 2012 ISSN: 2070-1721 Elliptic Curve-Based Certificateless Signatures for Identity-Based Encryption (ECCSI) Abstract Many signature schemes currently in use rely on certificates for authentication of identity. In Identity-based cryptography, this adds unnecessary overhead and administration. The Elliptic Curve- based Certificateless Signatures for Identity-based Encryption (ECCSI) signature scheme described in this document is certificateless. This scheme has the additional advantages of low bandwidth and low computational requirements. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This document is a product of the Internet Engineering Task Force (IETF). It has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6507. Copyright Notice Copyright (c) 2012 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 (http://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 Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Groves Informational [Page 1] RFC 6507 ECCSI for Identity-Based Encryption February 2012 Table of Contents 1. Introduction ....................................................2 1.1. Requirements Terminology ...................................3 2. Architecture ....................................................3 3. Notation ........................................................5 3.1. Arithmetic .................................................5 3.2. Representations ............................................6 3.3. Format of Material .........................................6 4. Parameters ......................................................7 4.1. Static Parameters ..........................................7 4.2. Community Parameters .......................................8 5. Algorithms ......................................................8 5.1. User Key Material ..........................................8 5.1.1. Algorithm for Constructing (SSK,PVT) Pair ...........8 5.1.2. Algorithm for Validating a Received SSK .............9 5.2. Signatures .................................................9 5.2.1. Algorithm for Signing ...............................9 5.2.2. Algorithm for Verifying ............................10 6. Security Considerations ........................................11 7. References .....................................................13 7.1. Normative References ......................................13 7.2. Informative References ....................................13 Appendix A. Test Data..............................................14 1. Introduction Digital signatures provide authentication services across a wide range of applications. A chain of trust for such signatures is usually provided by certificates. However, in low-bandwidth or other resource-constrained environments, the use of certificates might be undesirable. This document describes an efficient scheme, ECCSI, for elliptic curve-based certificateless signatures, primarily intended for use with Identity-Based Encryption (IBE) schemes such as described in [RFC6508]. As certificates are not needed, the need to transmit or store them to authenticate each communication is obviated. The algorithm has been developed by drawing on ideas set out by Arazi [BA] and is originally based upon the Elliptic Curve Digital Signature Algorithm [ECDSA], one of the most commonly used signature algorithms. The algorithm is for use in the following context: * where there are two parties, a Signer and a Verifier; * where short unambiguous Identifier strings are naturally associated to each of these parties;Show full document text