# Encryption-Decryption-Encryption

I have learned from Applied Cryptography that triple encryption with three independent keys in encryption-decryption-encryption (EDE) process gives security not higher then $2^{2n}$ when it comes to meet-in-the-middle attack, where $n$ is keysize. If the triple encryption is done in encryption-encryption-encryption (EEE) process instead, is the security still the same as in EDE process or less?

I'm just curious to know how and how much security does this middle decryption provide?

• Sep 3, 2014 at 20:48
• This isn't quite a duplicate, however a related question (specific to DES) is crypto.stackexchange.com/questions/2060/… Sep 3, 2014 at 20:49
• @poncho 20 seconds too slow :) Sep 3, 2014 at 20:49
• @CodesInChaos: hey, if I hadn't bothered typing in all of "This isn't a quite a duplicate...", I would have been first :-) Sep 3, 2014 at 20:56
• thnaks pancho for your answer in the related question it cleared a lot :) Sep 4, 2014 at 8:51