Re: RE: RE: [PHP] Mcrypt: Blowfish or Twofish or no fish? part 3

And why not use AES, which is an industry standard and having being proven as the best encryption algorithm in recent times? http://csrc.nist.gov/encryption/aes/aesfact.html As far as ECB mode is concerned, I dont know what problems you are talking about. I'm aware that the data gets encrypted in independed blocks and its easier to crack it, but its faster than other modes. Tx, Vinod. On Wed, 22 May 2002 John Horton wrote :

why use AES? Blowfish can have a 448 bit key size! Also, why use ebc mode with all the problems which come with it? JH -----Original Message----- From: Vinod Panicker [mailto:thisisvinod@rediffmail.com] Sent: 22 May 2002 10:06 To: Jimmy Lantz Cc: php-general@lists.php.net Subject: Re: RE: [PHP] Mcrypt: Blowfish or Twofish or no fish? part 3 There is no use of hashing in file-encryption except to use it as a check - to see if the decrypted file matches the original file. To do this check, you can use either MD5 or SHA1. The choice is urs. If ur looking for a good encryption algorithm, you might want to consider AES (Rijndael). It supports encryption using different key sizes as well as all modes. You can take your pick from ECB / CBC also. For binary file encryption, i would recommend ECB mode. For text files, it would be better that you use CBC mode. Tx, Vinod. On Wed, 22 May 2002 Jimmy Lantz wrote :

I believe that twofish has been successfully broken, so use blowfish instead. Typically, for encrypting files you will use an algorithm like blowfish in cbc mode (as opposed to ebc mode) but I don't

know

if Mcrypt supports this. Also, when creating the hash of the file, it

is

probably best to use SHA-1 instead of MD5, as there appears to be some

concern

with MD5 over it's compression function. HTH JH

It helps :) I have been looking into Blowfish with cbc mode :) If I use SHA-1 it's still no way to dehash it during decryption of the file, so I fail to see the use of Hashing in fileencryption. Could someone enlighten me? / Jim -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php _________________________________________________________ Click below to visit monsterindia.com and review jobs in India or Abroad http://monsterindia.rediff.com/jobs -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php

_________________________________________________________ Click below to visit monsterindia.com and review jobs in India or Abroad http://monsterindia.rediff.com/jobs