ECB1 Vs ECB2

[Roy Fridman]

hi,

can someone please tell me which of the two flavors crypto++ support?

where can i find any documentation that distinguishes between AES-ECB1 and AES-ECB2?

thanks,

[Jean-Pierre Münch]

hi,

can you please tell me where you found "AES-ECB1" and "AES-ECB2" as I never heard before of this two modes.
But I can tell you already now, that crypto++ supports AES-ECB although it's ABSOLUTELY NOT RECOMMENDED.
You can access it via ECB<AES>::Encryption Encryptor(Key,Keylength).
Of course you must specify using namespace CryptoPP before or you have to add CryptoPP:: in front of the ECB and AES.

BR

JPM

[Jeffrey Walton]

On Monday, September 8, 2014 3:48:57 AM UTC-4, Roy Fridman wrote:

can someone please tell me which of the two flavors crypto++ support?

where can i find any documentation that distinguishes between AES-ECB1 and AES-ECB2?

See Section 6.1, Electronic Codebook Mode, of NIST SP 800-38a. http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf

There's other references, too, like FIPS Publication 8 and ANSI 9.52. But they are consistent with each other.

Jeff

[Mouse]

Please be so kind to provide page reference in the NIST document http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf, where it describes ECB1, ECB2, and the difference between them.

I seem to be able to find there only AES-ECB - but not ECB1, nor ECB2. Section 6.1 that you mentioned, defines "normal" ECB.

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Regards,
Mouse

[Jeffrey Walton]

On Tuesday, September 9, 2014 8:48:14 AM UTC-4, Mouse wrote:

Please be so kind to provide page reference in the NIST document http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf, where it describes ECB1, ECB2, and the difference between them.

 Oh, my bad. I was only providing references to ECB mode. Roy will have to figure out what he has.

I know nothing about those other modes. I don't ever recall reading about them.

Jeff

[Mouse]

FWIW and AFAIK, there is only one ECB mode, which - as Jeffrey mentioned - is defined in the NIST SP800-38a publication.

I personally suspect ECB1 & ECB2 are both BS, regardless of the block cipher used with it.

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Regards,
Mouse