pksig_cl04

Camenisch-Lysyanskaya Signature (CL04)

Authors: J. Camenisch, A. Lysyanskaya

Title: “Signature Schemes and Anonymous Credentials from Bilinear Maps”

Published in: CRYPTO, 2004

Available from: http://www.cs.brown.edu/~anna/papers/cl04.pdf

Notes: Scheme A on page 5, section 3.1.

Scheme Properties

• Type: signature (identity-based)

• Setting: bilinear groups (asymmetric)

• Assumption: LRSW

Implementation

Authors:

10. Ayo Akinyele

Date:

1/2012

class pksig_cl04.CL04(groupObj)

Bases: PKSig

>>> from charm.toolbox.pairinggroup import PairingGroup
>>> group = PairingGroup('MNT224')
>>> cl = CL04(group)
>>> master_public_key = cl.setup()
>>> (public_key, secret_key) = cl.keygen(master_public_key)
>>> msg = "Please sign this stupid message!"
>>> signature = cl.sign(public_key, secret_key, msg)
>>> cl.verify(public_key, msg, signature)
True

keygen(mpk)

setup()

sign(pk, sk, M)

verify(pk, M, sig)

pksig_cl04.main()