Bruce Schneier thought highly of IDEA in 1996, writing: "In my opinion, it is the best and most secure block algorithm available to the public at this time." (Applied Cryptography, 2nd ed.) However, by 1999 he was no longer recommending IDEA due to the availability of faster algorithms, some progress in its cryptanalysis, and the issue of patents.
Bruce Schneier thought highly of IDEA in 1996 writing "In my opinion it is the best and most secure block algorithm available to the public at this time" (Applied Cryptography 2nd ed) However by 1999 he was no longer recommending IDEA due to the availability of faster algorithms some progress in its cryptanalysis and the issue of patents