pksig_chch

Jae Choon Cha and Jung Hee Cheon - Identity-based Signatures

From: “J. Cha and J. Choen - An identity-based signature from gap Diffie-Hellman groups.”

Published in: PKC 2003

Available from: Vol. 2567. LNCS, pages 18-30

Notes:

• type: signature (ID-based)
• setting: bilinear groups (asymmetric)

Authors:

10. Ayo Akinyele

Date:

11/2011

class pksig_chch.CHCH(groupObj)

Bases: charm.toolbox.PKSig.PKSig

>>> from charm.toolbox.pairinggroup import PairingGroup
>>> group = PairingGroup('SS512')
>>> chch = CHCH(group)
>>> (master_public_key, master_secret_key) = chch.setup()
>>> ID = "janedoe@email.com"
>>> (public_key, secret_key) = chch.keygen(master_secret_key, ID)  
>>> msg = "this is a message!" 
>>> signature = chch.sign(public_key, secret_key, msg)
>>> chch.verify(master_public_key, public_key, msg, signature)
True

keygen(msk, ID)

setup()

sign(pk, sk, M)

verify(mpk, pk, M, sig)

pksig_chch.main()