All Outputs (3)

Efficient round-optimal blind signatures in the standard model (2017)
Book Chapter
Ghadafi, E. (2017). Efficient round-optimal blind signatures in the standard model. In A. Kiayias (Ed.), Financial Cryptography and Data Security (455-473). Malta: Springer Verlag

Blind signatures are at the core of e-cash systems and has numerous other applications. In this work we construct efficient blind and partially blind signature schemes over bilinear groups in the standard model. Our schemes yield short signatures co... Read More about Efficient round-optimal blind signatures in the standard model.

How low can you go? Short structure-preserving signatures for Diffie-Hellman vectors
Book Chapter
Ghadafi, E. (2017). How low can you go? Short structure-preserving signatures for Diffie-Hellman vectors. In M. O'Neill (Ed.), 16th IMA International Conference on Cryptography and Coding. Oxford - UK: Springer

Structure-Preserving Signatures (SPSs) are an important tool for the design of modular cryptographic protocols. It has been proven that such schemes in the most efficient Type-3 bilinear group setting have a lower bound of 3-element signatures, wh... Read More about How low can you go? Short structure-preserving signatures for Diffie-Hellman vectors.

Attribute-based signatures with user-controlled linkability without random oracles
Book Chapter
Ghadafi, E., & El Kaafarani, A. (2017). Attribute-based signatures with user-controlled linkability without random oracles. In M. O'Neill (Ed.), Cryptography and Coding. Oxford - UK: Springer International Publishing. https://doi.org/10.1007/978-3-319-71045-7

Attribute-Based Signatures (ABS) are a versatile cryptographic primitive and have many applications. They are a generalization of many widely-used signature-related notions such as group, ring and mesh signatures. Attribute-Based Signatures with U... Read More about Attribute-based signatures with user-controlled linkability without random oracles.