IDEA is a minor revision of an earlier cipher , PES -LRB- MISC@1 -RRB- ; IDEA was originally called IPES -LRB- Improved PES -RRB- .

IDEA very like an earlier cipher called Proposed Encryption Standard -LRB- PES -RRB- , but with some improvements . Because of this , IDEA was first called IPES -LRB- Improved PES -RRB- .
