Group Signatures with Designated Traceability
Hiroaki Anada, Masayuki Fukumitsu, Shingo Hasegawa · 2021
We propose a group signature scheme with a function of designated traceability; each opener has attributes and a signer of a group signature can be traced by only the openers whose attributes satisfy the boolean formula designated by the signer. We describe syntax and security definitions of the scheme. Then we give a generic construction of the scheme by employing a ciphertext-policy attribute-based encryption scheme.