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Lecture notes in computer science

Post-quantum Key-Blinding for Authentication in Anonymity Networks

Edward Eaton, Douglas Stebila, Roy Stracovsky

Published Jan 1, 2021• 13 citations
Publisher
DOI
10.1007/978-3-030-88238-9_4

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Authenticated Key Exchange (AKE) is a cryptographic protocol to share a common session key among multiple parties. Usually, PKI-based AKE schemes are designed to guarantee secrecy of the session key and mutual authentication. However, in practice, there are many cases where mutual authentication is undesirable such as in anonymous networks like Tor and Riffle, or difficult to achieve due to the certificate management at the user level such as the Internet. Goldberg et al. formulated a model of anonymous one-sided AKE which guarantees the anonymity of the client by allowing only the client to authenticate the server, and proposed a concrete scheme. However, existing anonymous one-sided AKE schemes are only known to be secure in the random oracle model. In this paper, we propose generic constructions of anonymous one-sided AKE in the random oracle model and in the standard model, respectively. Our constructions allow us to construct the first post-quantum anonymous one-sided AKE scheme from isogenies in the standard model.
The Edge-enabled Industrial Internet of Things (Edge-IIoT) has emerged as a fundamental architecture for intelligent manufacturing by enabling low-latency data collection, processing, and communication among distributed industrial devices. However, the open and distributed nature of Edge-IIoT introduces significant challenges to secure data authentication and privacy preservation. Meanwhile, conventional public key infrastructure incurs considerable certificate management overhead and is not well suited for future industrial environments in the presence of quantum computing. To address these challenges, this paper proposes a lattice-based certificateless blind signature scheme for secure and privacy-preserving authentication in Edge-IIoT. The proposed scheme integrates the Dilithium signature algorithm with certificateless public key cryptography and blind signature techniques to simultaneously provide anonymous authentication, data integrity, conditional identity revocation, and post-quantum security while eliminating the certificate management overhead associated with traditional public key infrastructures. Furthermore, the proposed construction improves existing lattice-based certificateless blind signature schemes by addressing identified security weaknesses and strengthening resistance against forgery attacks, while effectively avoiding the key escrow problem inherent in identity-based cryptography. The correctness, blindness, and unforgeability of the proposed scheme are formally proved in the random oracle model based on the hardness of the Module Short Integer Solution (MSIS) problem. In addition, theoretical performance analysis demonstrates that the proposed scheme incurs acceptable computational, communication, and storage overhead while providing comprehensive security properties, including certificateless operation, identity anonymity, no key escrow, conditional revocation, and post-quantum security. Overall, the proposed scheme achieves an effective balance between security, privacy preservation, and efficiency, which exhibits favorable theoretical security-efficiency trade-offs for secure industrial data authentication in resource-constrained Edge-IIoT environments. Practical implementation is left for future investigation.
Digital signatures are used to ensure authentication. Blind signature schemes are a special form of digital signatures and important in scenarios which depend on anonymous and secure authentication. (e.g. e-voting) The common digital blind signature schemes are based on asymmetric cryptography with underlying hard problems like integer factorization or discrete logarithm. These hard problems will become weak with the development of quantum computers. To avoid the uselessness of classic cryptography in the post quantum era, it will be important to find alternative methods based on other hard problems. This book deals with the attempt of developing a new blind signature scheme based on lattice signature schemes.