{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,22]],"date-time":"2025-08-22T03:10:16Z","timestamp":1755832216438,"version":"3.44.0"},"reference-count":0,"publisher":"EasyChair","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>Piccolo is a 64-bit block cipher proposed by Shibutani et al. in 2011, supporting 80-bit and 128-bit keys. In higher order differential cryptanalysis, computer experiments have verified that Piccolo has a 6-round characteristic using the 32-nd order differential, which was theoretically extended to a 7-round characteristic using the 48-th order differential. The integral attack is cryptanalysis, similar to a higher order differential cryptanalysis. An investigation of integral characteristics by establishing the Mixed Integer Linear Programming (MILP) model based on bit-based division property has revealed the existence of a 7-round integral characteristic using a 63-rd order differential, and a search using the Satisfiability Problem (SAT) has found a same-round integral characteristic using the 56-th order differential. In this paper, we introduce the integral property based on the frequency distribution, clarify the reason for the 5-round integral characteristic using the 16-th order differential we found by computer experiment, and derive the integral characteristics by applying the round extension.<\/jats:p><jats:p>Then, we show that if the property can be used in the attack equation, the key can be identified more efficiently than the conventional method. We also present the experimental results of a key recovery attack against the reduced-round Piccolo.<\/jats:p>","DOI":"10.29007\/866h","type":"proceedings-article","created":{"date-parts":[[2025,8,21]],"date-time":"2025-08-21T22:10:10Z","timestamp":1755814210000},"page":"99-83","source":"Crossref","is-referenced-by-count":0,"title":["Improved Integral Cryptanalysis on Reduced-Round Piccolo"],"prefix":"10.29007","volume":"106","author":[{"given":"Naoki","family":"Shibayama","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yasutaka","family":"Igarashi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"11545","event":{"name":"Proceedings of the 20th Asia Joint Conference on Information Security"},"container-title":["EPiC Series in Computing"],"original-title":[],"deposited":{"date-parts":[[2025,8,21]],"date-time":"2025-08-21T22:10:12Z","timestamp":1755814212000},"score":1,"resource":{"primary":{"URL":"https:\/\/easychair.org\/publications\/paper\/RPLD"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[null]]},"references-count":0,"URL":"https:\/\/doi.org\/10.29007\/866h","relation":{},"ISSN":["2398-7340"],"issn-type":[{"type":"print","value":"2398-7340"}],"subject":[]}}