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In this work we introduce a fault attack on the CAESAR candidate ACORN v2. Our attack is done under the assumption of random fault injection into an initial state of ACORN v2 and contains two main steps: fault locating and equation solving. At the first step, we first present a fundamental fault locating method, which uses 99-bit output keystream to determine the fault injected location with probability <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\"><mml:mn mathvariant=\"normal\">97.08<\/mml:mn><mml:mi mathvariant=\"normal\">%<\/mml:mi><\/mml:math>. And then several improvements are provided, which can further increase the probability of fault locating to almost 1. As for the system of equations retrieved at the first step, we give two solving methods at the second step, that is, linearization and guess-and-determine. The time complexity of our attack is not larger than <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M2\"><mml:mi>c<\/mml:mi><mml:mo>\u00b7<\/mml:mo><mml:msup><mml:mrow><mml:mn mathvariant=\"normal\">2<\/mml:mn><\/mml:mrow><mml:mrow><mml:mn mathvariant=\"normal\">179.19<\/mml:mn><mml:mo>-<\/mml:mo><mml:mn mathvariant=\"normal\">1.76<\/mml:mn><mml:mi>N<\/mml:mi><\/mml:mrow><\/mml:msup><\/mml:math> at worst, where <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M3\"><mml:mrow><mml:mi>N<\/mml:mi><\/mml:mrow><\/mml:math> is the number of fault injections such that <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M4\"><mml:mn mathvariant=\"normal\">31<\/mml:mn><mml:mo>\u2264<\/mml:mo><mml:mi>N<\/mml:mi><mml:mo>\u2264<\/mml:mo><mml:mn mathvariant=\"normal\">88<\/mml:mn><\/mml:math> and <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M5\"><mml:mrow><mml:mi>c<\/mml:mi><\/mml:mrow><\/mml:math> is the time complexity of solving linear equations. Our attack provides some insights into the diffusion ability of such compact stream ciphers.<\/jats:p>","DOI":"10.1155\/2017\/3834685","type":"journal-article","created":{"date-parts":[[2017,10,2]],"date-time":"2017-10-02T17:01:22Z","timestamp":1506963682000},"page":"1-16","source":"Crossref","is-referenced-by-count":5,"title":["Fault Attack on the Authenticated Cipher ACORN v2"],"prefix":"10.1155","volume":"2017","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5603-2349","authenticated-orcid":true,"given":"Xiaojuan","family":"Zhang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China"},{"name":"School of Cyber Security, University of Chinese Academy of Sciences, Beijing, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiutao","family":"Feng","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China"},{"name":"Key Laboratory of Mathematics Mechanization, Academy of Mathematics and System Science, Chinese Academy of Sciences, Beijing, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dongdai","family":"Lin","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"key":"2","year":"2014"},{"key":"3","year":"2015"},{"key":"4","year":"2016"},{"key":"5","year":"2014","journal-title":"Posed on the crypto-competition mailing list"},{"key":"6","year":"2015","journal-title":"Posed on the crypto-competition mailing list"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.1007\/978-981-10-2741-3_2"},{"key":"10","year":"2016"},{"key":"11","journal-title":"IACR Cryptology ePrint Archive, 1132, 2016"},{"key":"13","journal-title":"Cryptology ePrint Archive: Report 2017\/678"},{"key":"14","doi-asserted-by":"publisher","DOI":"10.1007\/BFb0052259"},{"key":"15","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-540-28632-5_18"},{"key":"16","doi-asserted-by":"publisher","DOI":"10.1007\/11894063_6"},{"key":"17","doi-asserted-by":"publisher","DOI":"10.1007\/3-540-36400-5_2"},{"key":"21","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-21969-6_19"},{"key":"22","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-33027-8_8"},{"key":"23","doi-asserted-by":"publisher","DOI":"10.1109\/TC.2014.2339854"},{"key":"24","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-40349-1_13"},{"key":"25","doi-asserted-by":"publisher","DOI":"10.1007\/s13389-014-0083-9"}],"container-title":["Security and Communication Networks"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/downloads.hindawi.com\/journals\/scn\/2017\/3834685.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/scn\/2017\/3834685.xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/scn\/2017\/3834685.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2017,10,2]],"date-time":"2017-10-02T17:01:25Z","timestamp":1506963685000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.hindawi.com\/journals\/scn\/2017\/3834685\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017]]},"references-count":18,"alternative-id":["3834685","3834685"],"URL":"https:\/\/doi.org\/10.1155\/2017\/3834685","relation":{},"ISSN":["1939-0114","1939-0122"],"issn-type":[{"value":"1939-0114","type":"print"},{"value":"1939-0122","type":"electronic"}],"subject":[],"published":{"date-parts":[[2017]]}}}