BLS Signatures
draft-irtf-cfrg-bls-signature-04

Document Type Active Internet-Draft (cfrg RG)
Authors Dan Boneh  , Sergey Gorbunov  , Riad Wahby  , Hoeteck Wee  , Zhenfei Zhang 
Last updated 2020-09-10
Replaces draft-boneh-bls-signature
Stream IRTF
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CFRG                                                            D. Boneh
Internet-Draft                                       Stanford University
Intended status: Informational                               S. Gorbunov
Expires: 14 March 2021                            University of Waterloo
                                                                R. Wahby
                                                     Stanford University
                                                                  H. Wee
                                             NTT Research and ENS, Paris
                                                                Z. Zhang
                                                                Algorand
                                                       10 September 2020

                             BLS Signatures
                    draft-irtf-cfrg-bls-signature-04

Abstract

   BLS is a digital signature scheme with aggregation properties.  Given
   set of signatures (signature_1, ..., signature_n) anyone can produce
   an aggregated signature.  Aggregation can also be done on secret keys
   and public keys.  Furthermore, the BLS signature scheme is
   deterministic, non-malleable, and efficient.  Its simplicity and
   cryptographic properties allows it to be useful in a variety of use-
   cases, specifically when minimal storage space or bandwidth are
   required.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   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 14 March 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Boneh, et al.             Expires 14 March 2021                 [Page 1]
Internet-Draft                BLS-signature               September 2020

   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 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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Comparison with ECDSA . . . . . . . . . . . . . . . . . .   4
     1.2.  Organization of this document . . . . . . . . . . . . . .   4
     1.3.  Terminology and definitions . . . . . . . . . . . . . . .   5
     1.4.  API . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     1.5.  Requirements  . . . . . . . . . . . . . . . . . . . . . .   7
   2.  Core operations . . . . . . . . . . . . . . . . . . . . . . .   7
     2.1.  Variants  . . . . . . . . . . . . . . . . . . . . . . . .   7
     2.2.  Parameters  . . . . . . . . . . . . . . . . . . . . . . .   7
     2.3.  KeyGen  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     2.4.  SkToPk  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     2.5.  KeyValidate . . . . . . . . . . . . . . . . . . . . . . .  11
     2.6.  CoreSign  . . . . . . . . . . . . . . . . . . . . . . . .  11
     2.7.  CoreVerify  . . . . . . . . . . . . . . . . . . . . . . .  12
     2.8.  Aggregate . . . . . . . . . . . . . . . . . . . . . . . .  12
     2.9.  CoreAggregateVerify . . . . . . . . . . . . . . . . . . .  13
   3.  BLS Signatures  . . . . . . . . . . . . . . . . . . . . . . .  14
     3.1.  Basic scheme  . . . . . . . . . . . . . . . . . . . . . .  14
       3.1.1.  AggregateVerify . . . . . . . . . . . . . . . . . . .  15
     3.2.  Message augmentation  . . . . . . . . . . . . . . . . . .  15
       3.2.1.  Sign  . . . . . . . . . . . . . . . . . . . . . . . .  15
       3.2.2.  Verify  . . . . . . . . . . . . . . . . . . . . . . .  16
       3.2.3.  AggregateVerify . . . . . . . . . . . . . . . . . . .  16
     3.3.  Proof of possession . . . . . . . . . . . . . . . . . . .  17
       3.3.1.  Parameters  . . . . . . . . . . . . . . . . . . . . .  18
       3.3.2.  PopProve  . . . . . . . . . . . . . . . . . . . . . .  18
       3.3.3.  PopVerify . . . . . . . . . . . . . . . . . . . . . .  19
       3.3.4.  FastAggregateVerify . . . . . . . . . . . . . . . . .  19
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