This project is the implementation of Hemanta Maji's Attribute-based Signature (ABS) using Java Pairing-Based Cryptography Library (JPBC).

Attribute-based Signature (ABS) is a scheme to provide proof of possessions of attributes and provide authenticity of the data issuers. Combining with attribute-based encryption such as CP-ABE or KP-ABE, ABS is useful for different scenarios such as attribute-based messaging (ABM), secure voting and fine-grain user access control.

This ABS implementation is based on H. Maji's paper[1] and Sanjeev Kaushik Ramani's NDN-ABS project [2, 3]. For simplicity, this implementation only supported AND operations in the Monotone Span Program (MSP), and at most 10x10 AND matrix is pre-computed as cheatyMap to accelerate the encryption process. As a result, only less than or equal to 10 attributes is supported, but I guess it should be good enough for most scenarios.

This project supports both Type A (Symmetric) and Type D (Asymmetric) elliptic curve.

• The attribute array used in sign() and verify() must follow the same order.
• Maximum 10 attributes are supported.
• Only AND operations are supported.

[1] H. Maji, M. Prabhakaran, and M. Rosulek, “Attribute-Based Signatures: Achieving Attribute-Privacy and Collusion-Resistance,” in IACR Cryptology ePrint Archive, 2008. http://eprint.iacr.org/2008/328

[2] S. K. Ramani, R. Tourani, G. Torres, S. Misra, and A. Afanasyev, “NDN-ABS: Attribute-based signature scheme for named data networking,” ICN 2019 - Proc. 2019 Conf. Information-Centric Netw., pp. 123–133, 2019. https://named-data.net/publications/ndnabs/

[3] Sanjeevr93, PyNDNABS: Python Implementation of NDN-ABS. https://github.com/sanjeevr93/PyNDNABS

[4] A. De Caro and V. Iovino, “jPBC: Java pairing based cryptography,” in Proceedings of the 16th IEEE Symposium on Computers and Communications, ISCC 2011, 2011, pp. 850–855. http://gas.dia.unisa.it/projects/jpbc/

Please feel free to use my project with the following citation:

Man Chun Chow. JPBC Implementation of H. Maji's ABS. https://github.com/cmcvista/JPBC-ABS2, 2019