Abstract
Synchronized aggregate signature is a special type of signature that all signers have a synchronized time period and allows aggregating signatures which are generated in the same period. This signature has a wide range of applications for systems that have a natural reporting period such as log and sensor data, or blockchain protocol.
In CT-RSA 2016, Pointcheval and Sanders proposed the new randomizable signature scheme. Since this signature scheme is based on type-3 pairing, this signature achieves a short signature size and efficient signature verification.
In this paper, we design the Pointchcval-Sanders signature-based synchronized aggregate signature scheme and prove its security under the generalized Pointcheval-Sanders assumption in the random oracle model. Our scheme offers the most efficient aggregate signature verification among synchronized aggregate signature schemes based on bilinear groups.
A part of this work was supported by JST CREST JP-MJCR2113, JSPS KAKENHI JP21H04879, and the technology promotion association of Tsuruoka KOSEN.
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Tezuka, M., Tanaka, K. (2023). Pointcheval-Sanders Signature-Based Synchronized Aggregate Signature. In: Seo, SH., Seo, H. (eds) Information Security and Cryptology – ICISC 2022. ICISC 2022. Lecture Notes in Computer Science, vol 13849. Springer, Cham. https://doi.org/10.1007/978-3-031-29371-9_16
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