Self-certified Signature Scheme Research Articles

Provably Secure Lattice-Based Self-Certified Signature Scheme

Digital signatures are crucial network security technologies. However, in traditional public key signature schemes, the certificate management is complicated and the schemes are vulnerable to public key replacement attacks. In order to solve the problems, in this paper, we propose a self-certified signature scheme over lattice. Using the self-certified public key, our scheme allows a user to certify the public key without an extra certificate. It can reduce the communication overhead and computational cost of the signature scheme. Moreover, the lattice helps prevent quantum computing attacks. Then, based on the small integer solution problem, our scheme is provable secure in the random oracle model. Furthermore, compared with the previous self-certified signature schemes, our scheme is more secure.

S<SUP align="right">2</SUP>PAD: secure self-certified public auditing for data integrity in cloud storage and its extension

Cloud storage is an important service of cloud computing, it can offer services for data owners in a pay-as-you-go fashion. In cloud storage, after data files are outsourced, data owner no longer has physical controls over the storage. To protect the outsourced data in cloud storage against corruptions, several public auditing schemes for data integrity checking were proposed to achieve data integrity checking. The existing auditing schemes make the auditor execute high computation to check data integrity. It might become a burden for a lot of data owner. To solve the above problem, we propose a novel public auditing scheme with public verifiability and constant communication cost based on self-certified signature scheme in this paper. Thorough analysis shows that our proposed scheme is secure and efficient. The security of our scheme is based on the fixed inversion (FI) problem of the bilinear map and the inversion of hash function. Finally, based on the above protocol, we extend it into multi-user setting.

A New Self-Certified Signature Scheme Based on NTRUSing for Smart Mobile Communications

Smart mobile devices are critical component in the mobile communication, it has been acted as various services with the development of the mobile internet. For example, mobile payment has become universal in the mobile e-commerce, and it is widely attracting attention by most people. However, the extensive application of the mobile e-commerce would increase the security issue for mobile users who use the smart mobile devices, such as integrity and authentication protection for the transaction data and the user privacy. Furthermore, most smart mobile devices are designed with low power and resource constrained systems, it is not suitable for providing competent security levels through higher complexity cryptographic algorithms to resolve the above security issues. In this paper, we propose a new self-certified digital signature scheme based on NTRUSign which builded in the complexity of approximating the closest vector in NTRU lattices without certification for the smart mobile communication. In contrast to previous research, the result shows that the new scheme achieve such as efficiency that it may overcome the space obstacles and provide a real-world practical solution for some security issues in the smart mobile communication.

Security of self-certified signatures

A digital signature provides the authenticity of a signed message with respect to a public key, while the authenticity of the public key with respect to a signer lies on a certificate provided by a certificate authority. Whenever a verifier wants to verify a signature, he has first to verify the corresponding certificate. To reduce this burden, Lee and Kim proposed a new digital signature scheme called self-certified signature (SCS). In this scheme, verifiers can validate both the signature on the message and the related certificate information simultaneously. Then they extended the proposed self-certified signature scheme to a multi-certificate signature scheme (MCS), in which multiple certificate information need to be verified. In this paper, we show that their multi-certificate signature scheme does not satisfy certification as Lee and Kim claimed.

Self-certified signature scheme from pairings

To overcome key escrow problems and secure channel problems that seem to be inherent to identity-based cryptography, here we propose a self-certified signature scheme (SCS) from pairings on elliptic curves. We also give a security model, and further provide a security proof in random oracle model. The scheme incorporates the advantages of self-certified public keys and pairings. Besides, it can also provide an implicit as well as mandatory verification of public keys.