International Data Encryption Algorithm
↑ Garfinkel, Simson (December 1, 1994). PGP: Pretty Good Privacy. O'Reilly Media. pp. 101–102. ISBN 978-1565920989
↑ Biham, E.; Dunkelman, O.; Keller, N.. “A New Attack on 6-Round IDEA”. Springer-Verlag. http://www.cosic.esat.kuleuven.be/publications/article-920.ps
↑ Crypto Guru Bruce Schneier Answers Slashdot、1999年10月29日
1 2 Daemen, Joan; Govaerts, Rene; Vandewalle, Joos (1993), “Weak Keys for IDEA”, Advances in Cryptology, CRYPTO 93 Proceedings: 224–231, http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.51.9466
↑ Nakahara, Jorge Jr.; Preneel, Bart; Vandewalle, Joos (2002), A note on Weak Keys of PES, IDEA and some Extended Variants, http://citeseerx.