ac17

FAME: Fast Attribute-based Message Encryption (AC17)

Authors: Shashank Agrawal, Melissa Chase

Title: “FAME: Fast Attribute-based Message Encryption”

Published in: ACM CCS, 2017

Available from: https://eprint.iacr.org/2017/807

Notes: Implemented the scheme in Section 3; fast and practical ABE

Scheme Properties

• Type: ciphertext-policy attribute-based encryption

• Setting: Pairing groups

• Assumption: Variant of k-linear (k >= 2)

Implementation

Authors:

Shashank Agrawal

Date:

05/2016

class ac17.AC17CPABE(group_obj, assump_size, verbose=False)

Bases: ABEnc

decrypt(pk, ctxt, key)

Decrypt ciphertext ctxt with key key.

encrypt(pk, msg, policy_str)

Encrypt a message msg under a policy string.

keygen(pk, msk, attr_list)

Generate a key for a list of attributes.

setup()

Generates public key and master secret key.