bsw07¶

John Bethencourt, Amit Sahai, Brent Waters

From: “Ciphertext-Policy Attribute-Based Encryption”
Published in: 2007
Available from: https://doi.org/10.1109/SP.2007.11
Notes: Implemented an asymmetric version of the scheme in Section 4.2
Security Assumption: Generic group model

type:           ciphertext-policy attribute-based encryption
setting:        Pairing

Authors:	Shashank Agrawal
Date:	05/2016

class bsw07.BSW07(group_obj, verbose=False)[source]¶

Bases: charm.toolbox.ABEnc.ABEnc

decrypt(pk, ctxt, key)[source]¶: Decrypt ciphertext ctxt with key key.

encrypt(pk, msg, policy_str)[source]¶: Encrypt a message M under a policy string.

keygen(pk, msk, attr_list)[source]¶: Generate a key for a set of attributes.

setup()[source]¶: Generates public key and master secret key.