Comment on ‘Targeted Ciphers for Format‐Preserving Encryption’ from Selected Areas in Cryptography 2018

Comment on ‘Targeted Ciphers for Format‐Preserving Encryption’ from Selected Areas in Cryptography 2018

Format‐preserving encryption (FPE) allows encrypting plaintexts while preserving a specific format. In Selected Areas in Cryptography 2018, two targeted ciphers were proposed as new FPE schemes. The second scheme was designed with an algorithm called Mix–Swap–Unmix that is shown to be equivalent to...

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Veröffentlicht in:IET information security 2021-09, Vol.15 (5), p.395-400
Hauptverfasser: Wang, Dachao, Wang, Baocang, Ping, Yuan
Format: Artikel
Sprache:eng
Schlagworte:
Cryptography
Data security
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Zusammenfassung:Format‐preserving encryption (FPE) allows encrypting plaintexts while preserving a specific format. In Selected Areas in Cryptography 2018, two targeted ciphers were proposed as new FPE schemes. The second scheme was designed with an algorithm called Mix–Swap–Unmix that is shown to be equivalent to a particular matching exchange process under a specific setting. In this comment paper, we prove that the matching exchange process is invalid. As a result, this equivalence does not exist.
ISSN:1751-8709
1751-8717
DOI:10.1049/ise2.12028