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custom encryption and decryption

marrom makash

ho dudes.

i wanna make some custom encryption functions to stop people snooping at my data. i dont wanna use aes or the other ones.

btw, i think that i may need the encryption template, when i saw through some crypto code.

can someone help with good code?

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  • 0 in reply to Dan Curran

    => And what if the Chinese knows about this back door without NSA knowing about it...

    =====================================================================================

    August 17, 2005
    Chinese Cryptographers Denied U.S. Visas

    www.schneier.com/.../chinese_cryptog.html

    =>

    Chinese cryptographer Xiaoyun Wang, the woman who broke SHA-1 last year, was unable to attend the Crypto conference to present her paper on Monday. The U.S. government didn't give her a visa in time:

    • On Monday, she was scheduled to explain her discovery in a keynote address to an international group of researchers meeting in California.
    • But a stand-in had to take her place, because she was not able to enter the country. Indeed, only one of nine Chinese researchers who sought to enter the country for the conference received a visa in time to attend.

    Sadly, this is now common:

    • Although none of the scientists were officially denied visas by the United States Consulate, officials at the State Department and National Academy of Sciences said this week that the situation was not uncommon.
    • Lengthy delays in issuing visas are now routine, they said, particularly for those involved in sensitive scientific and technical fields.

  • 0 in reply to Dan Curran

    I really dont think its right forum to post this question but since you have worked extensively in this domain your inputs would be of great help.

    Requirement: Avoiding repeated decryption of file/data
    Expected behavior of Algorithm:

    Example: consider file(f0) on encryption gives encrypted file(ef0) and key(ek0) i.e
    f0 ----> ef0 and ek0.(repeating encryption of encrypted data)
    ef0 ----> ef1 and ek1.
    ef1 ----> ef2 and ek2.
    . .
    . efn-1 ----> efn and ekn.

    On applying decryption on efn using ekn I should be able to get f0 bypassing decryption of (efn-1, ...ef2, ef1). Hence key is expected to have delta value during each successive encryption.

    Is there any encryption and decryption algorithm currently displaying this behavior?

    Looking forward for your suggestion.