{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,7]],"date-time":"2025-11-07T09:52:15Z","timestamp":1762509135578,"version":"build-2065373602"},"reference-count":28,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2024,4,5]],"date-time":"2024-04-05T00:00:00Z","timestamp":1712275200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"R+D+i grant P2QProMeTe","award":["PID2020-112586RB-I00","MCIU\/AEI\/10.13039\/501100011033","D5-2022-04"],"award-info":[{"award-number":["PID2020-112586RB-I00","MCIU\/AEI\/10.13039\/501100011033","D5-2022-04"]}]},{"name":"University of M\u00e1laga (Spain) through \u201cRed tem\u00e1tica BIOMED-SEC\u201d","award":["PID2020-112586RB-I00","MCIU\/AEI\/10.13039\/501100011033","D5-2022-04"],"award-info":[{"award-number":["PID2020-112586RB-I00","MCIU\/AEI\/10.13039\/501100011033","D5-2022-04"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>Symmetric cryptography provides the best examples of cryptosystems to be applied in lightweight environments (e.g., IoT). A representative example is the cryptosystem TinyJambu, one of the ten finalists in the NIST Lightweight Cryptography Standardization Project. It is an authentication encryption with associated data scheme that is extremely lightweight and fast. In this work, we analyze the security of TinyJambu from two distinct and non-symmetric points of view: (1) the improvement of the best cryptanalytical attack found in the literature and (2) a randomness analysis of the generated sequences. Concerning item (1), we launched a differential forgery attack with probability 2\u221265.9487, which was improved considerably compared with previous numerical results. Concerning item (2), we analyzed the degree of randomness of the TinyJambu keystream sequences with a complete and powerful battery of statistical tests. This non-symmetric study shows the weakness of TinyJambu against cryptanalytic attacks as well as the strength of TinyJambu against statistical analysis.<\/jats:p>","DOI":"10.3390\/sym16040440","type":"journal-article","created":{"date-parts":[[2024,4,5]],"date-time":"2024-04-05T08:27:52Z","timestamp":1712305672000},"page":"440","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Security Analysis of the Symmetric Cryptosystem TinyJambu"],"prefix":"10.3390","volume":"16","author":[{"given":"Amparo","family":"F\u00faster-Sabater","sequence":"first","affiliation":[{"name":"Institute of Physical and Information Technologies (ITEFI), Consejo Superior de Investigaciones Cient\u00edficas (CSIC), Serrano 144, 28006 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. E.","family":"Pazo-Robles","sequence":"additional","affiliation":[{"name":"Institute of Physical and Information Technologies (ITEFI), Consejo Superior de Investigaciones Cient\u00edficas (CSIC), Serrano 144, 28006 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,4,5]]},"reference":[{"key":"ref_1","unstructured":"National Institute of Standards and Technology (2024, February 13). Lightweight Cryptography (LWC) Standardization Project, Available online: https:\/\/csrc.nist.gov\/projects\/lightweight-cryptography."},{"key":"ref_2","unstructured":"(2024, February 13). NIST Lightweight Cryptography Finalists, Available online: https:\/\/csrc.nist.gov\/Projects\/lightweight-cryptography\/finalists."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Paar, C., and Pelzl, J. (2010). 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