bsw07

Ciphertext-Policy Attribute-Based Encryption (BSW07) - Asymmetric

Authors: John Bethencourt, Amit Sahai, Brent Waters

Title: “Ciphertext-Policy Attribute-Based Encryption”

Published in: IEEE Symposium on Security and Privacy, 2007

Available from: https://doi.org/10.1109/SP.2007.11

Notes: Asymmetric version of the scheme in Section 4.2

Scheme Properties

• Type: ciphertext-policy attribute-based encryption

• Setting: Pairing groups

• Assumption: Generic group model

Implementation

Authors:

Shashank Agrawal

Date:

05/2016

class bsw07.BSW07(group_obj, verbose=False)

Bases: ABEnc

decrypt(pk, ctxt, key)

Decrypt ciphertext ctxt with key key.

encrypt(pk, msg, policy_str)

Encrypt a message M under a policy string.

keygen(pk, msk, attr_list)

Generate a key for a set of attributes.

setup()

Generates public key and master secret key.