Provable Secure Attribute-Based Proxy Signature Over Lattice Small Integer Solution Problem in Random Oracle Model

Current proxy signature schemes are mostly identity-based signatures that distinguish users by identity. This method faces some problems, such as identity information leakage and single access control. Attribute-based (ABPS) divides the signer’s into a collection of attributes; thus, users’ can be protected control become fine-grained. With development quantum computers, security based on traditional number theory problems is under threat. Therefore, we construct new attribute-based scheme lattice resist attacks. has properties both signatures, i.e., fine-grained strong undeniability properties. Moreover, small integer solution problem (SIS), our provably secure in random oracle model protects signer adaptive model.