TY - GEN
T1 - Format-preserving encryption algorithms using families of tweakable blockciphers
AU - Lee, Jung Keun
AU - Koo, Bonwook
AU - Roh, Dongyoung
AU - Kim, Woo Hwan
AU - Kwon, Daesung
N1 - Publisher Copyright:
© Springer International Publishing Switzerland 2015.
PY - 2014
Y1 - 2014
N2 - We present two new algorithms, FEA-1 and FEA-2, for secure and efficient format-preserving encryption. Each algorithm is built from a family of dedicated tweakable blockciphers supporting various block bit-lengths. The tweakable blockciphers in the same family have similar structures and are based on common building blocks, enabling security analyses in the same frameworks. Their security follows largely from the structures, the round functions, and the tweak schedules. Their structures are new tweakable Feistel schemes, which are shown to be indistinguishable from tweakable random permutations against adaptive chosen tweak, plaintext, and ciphertext attacks. Their building blocks are shown to have cryptographically strong properties. The proposed algorithms outperform existing ones. They are several times faster than FF1-AES on test platforms.
AB - We present two new algorithms, FEA-1 and FEA-2, for secure and efficient format-preserving encryption. Each algorithm is built from a family of dedicated tweakable blockciphers supporting various block bit-lengths. The tweakable blockciphers in the same family have similar structures and are based on common building blocks, enabling security analyses in the same frameworks. Their security follows largely from the structures, the round functions, and the tweak schedules. Their structures are new tweakable Feistel schemes, which are shown to be indistinguishable from tweakable random permutations against adaptive chosen tweak, plaintext, and ciphertext attacks. Their building blocks are shown to have cryptographically strong properties. The proposed algorithms outperform existing ones. They are several times faster than FF1-AES on test platforms.
KW - Format-preserving encryption
KW - Tweakable blockcipher
KW - Tweakable Feistel scheme
UR - http://www.scopus.com/inward/record.url?scp=84925260378&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-15943-0_9
DO - 10.1007/978-3-319-15943-0_9
M3 - Conference contribution
AN - SCOPUS:84925260378
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 132
EP - 159
BT - Information Security and Cryptology - ICISC 2014 - 17th International Conference, Revised Selected Papers
A2 - Kim, Jongsung
A2 - Lee, Jooyoung
PB - Springer Verlag
T2 - 17th International Conference on Information Security and Cryptology, ICISC 2014
Y2 - 3 December 2014 through 5 December 2014
ER -