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Paper 2019/1036

Post-Quantum Variants of ISO/IEC Standards: Compact Chosen Ciphertext Secure Key Encapsulation Mechanism from Isogenies

Kazuki Yoneyama

Abstract

ISO/IEC standardizes several chosen ciphertext-secure key encapsulation mechanism (KEM) schemes in ISO/IEC 18033-2. However, all ISO/IEC KEM schemes are not quantum resilient. In this paper, we introduce new isogeny-based KEM schemes (i.e., CSIDH-ECIES-KEM and CSIDH-PSEC-KEM) by modifying Diffie-Hellman-based KEM schemes in ISO/IEC standards. The main advantage of our schemes are compactness. The key size and the ciphertext overhead of our schemes are smaller than these of SIKE, which is submitted to NIST's post-quantum cryptosystems standardization, for current security analyses.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Published elsewhere. Minor revision. SSR2019
DOI
10.1145/3338500.3360336
Keywords
Post-quantum cryptosystemsIsogeny-based cryptosystemsCSIDH
Contact author(s)
kazuki yoneyama sec @ vc ibaraki ac jp
History
2019-09-18: revised
2019-09-16: received
See all versions
Short URL
https://ia.cr/2019/1036
License
Creative Commons Attribution
CC BY
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