pksig_cllww12_z

Chen-Lim-Ling-Wang-Wee Signature (CLLWW12)

Authors: J. Chen, H. Lim, S. Ling, H. Wang, H. Wee

Title: “Shorter IBE and Signatures via Asymmetric Pairings”

Published in: Pairing, 2012

Available from: http://eprint.iacr.org/2012/224

Notes: Section 5. Shorter IBE construction based on SXDH.

Scheme Properties

• Type: signature (identity-based)

• Setting: bilinear groups (asymmetric)

• Assumption: SXDH

Implementation

Authors:

Fan Zhang (zfwise@gwu.edu)

Date:

3/2013

Notes:

Swapped g1 and g2 to make signature faster. Optimized pairing operations.

class pksig_cllww12_z.Sign_Chen12_z(groupObj)

Bases: PKSig

>>> from charm.toolbox.pairinggroup import PairingGroup
>>> groupObj = PairingGroup('MNT224')
>>> m = "plese sign this message!!!!"
>>> cllww = Sign_Chen12_z(groupObj)
>>> (pk, sk) = cllww.keygen()
>>> signature = cllww.sign(pk, sk, m)
>>> cllww.verify(pk, signature, m) 
True

keygen()

sign(pk, sk, m)

verify(pk, sig, m)

pksig_cllww12_z.main()