International Data Encryption Algorithm (IDEA)
IDEA (International Data Encryption Algorithm) is an encryption
algorithm developed
at ETH in Zurich, Switzerland. It uses a block cipher
with a 128-bit key, and is
generally considered to be very secure. It is considered among the best publicly known algorithms.
In the several years that it has been in use, no practical attacks on it have been published
despite of a number of attempts to find some. IDEA is patented in the United States and in most of
the European countries. The patent is held by Ascom-Tech. Non-commercial use of IDEA is free.
Commercial licenses can be obtained by contacting Ascom-Tech.
Contributor(s): Orion Pronk
This was last updated in April 2005
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