Re: A few questions about C programming.

From: Paul Rubin (//phr.cx_at_NOSPAM.invalid)
Date: 10/06/04

  • Next message: DEMAINE Benoit-Pierre: "Re: A few questions about C programming." 
    Date: 05 Oct 2004 20:57:45 -0700

    DEMAINE Benoit-Pierre <nntp_pipex@demaine.info> writes:
    > | In asm, depending on the machine, there may be a hardware instructionn.
    >
    > No, I was asking about single instruction operation . About ASM, I use
    > intel 686.

    If you're programming in asm you should know how to read the manuals.

    > | You should not mess with the DES tables. They are carefully designed
    > | and if you change them, you don't have DES any more.
    >
    > I am aware of that ... that is why I asked about the rules to build
    > them. I am pretty sure there are alternative tables. Some tables which
    > keep the same proprieties, but doing stuff an other way. I dont care if
    > the resulting algorithme is not compatible with original algorithme, as
    > long as I can write myself the decoder part.

    DES is 30 years old and there's no reason to use it now unless you're
    trying to interoperate with something else that uses it. If you don't
    care about compatibility, use AES instead, not a modified DES.

  • Next message: DEMAINE Benoit-Pierre: "Re: A few questions about C programming."

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