Re: Advice needed - re Disseminating My Crypto Research Work.

There are five ciphers to hand and each one can be mathematically
demonstrated as having unbreakable security.

1. Is that "unbreakable security" as in "All possible plaintexts
are equally likely and having the ciphertext does not change that"?
(This is true of the one-time pad, and not of other ciphers.)

2. Does this cipher require at least as many true-random bits as
bits of plaintext messages sent over the lifetime of the use
of the cipher?

If your answer to 1 is NO, your cipher is not unbreakable. (Most
every cipher except the one-time-pad falls in this class, like AES,
DES, RSA (even with gigabit keys), etc.)

If your answer to 1 is YES and your answer to 2 is YES, you've
apparently re-invented the one-time-pad, with all the key-management
inconvenience that goes with it.

If your answer to 1 is YES and your answer to 2 is NO, you're
a snake-oil salesman and a liar.

Arguments of the form that "the number of possible keys is SO huge
that you couldn't possibly brute-force it in the lifetime of the
universe" do not imply "unbreakable security".

.

Relevant Pages

  • Re: SSN encryption
    ... Note that although Rubin doesn't provide the decryption ... Naturally it requires the secret key. ... a secret-key cipher that encrypts 9-digit plaintexts into ... given a list of distinct plaintexts and a scrambled ...
    (sci.crypt)
  • JEL sandbox cipher is weak
    ... Feistel cipher with a 64-bit f-function built from some 16x32 ... in a set of 2^64 known plaintexts or using 2^33 chosen plaintexts as ... We expect to find one right slid pair and one wrong ...
    (sci.crypt)
  • Re: Multiple encryption: again, and again, and again...
    ... > combo cipher is in fact more secure than a single cipher unless you know ... set) with respect to chosen plaintexts and access to their encryptions ... we know not to use block cipher ECB mode for long messages ...
    (sci.crypt)
  • Re: Some questions about stream cyphers.
    ... >> plaintexts, but in real systems you never have arbitrary plaintexts. ... >> encryption method in some real system it is very difficult to determine ... > While I don't think using such a cipher is a good idea it could ...
    (sci.crypt)
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