Re: Chosen plaintext attacks



On Sun, 19 Sep 2010 05:18:31 -0700 (PDT), JT
<jonas.thornvall@xxxxxxxxxxx> wrote:

Well everyone should forever remember that rossum said OTP to be
useless, they do not resist a known plaintext attack.

JT
Your ignorance is showing. The OTP can always resist a known
plaintext attack. Stream cyphers may not be able to resist. It is
the ability to resist that helps us separate the secure stream cyphers
from the insecure stream cyphers.

You didn't bother to calculate unicity distances for the OTP and for
your cypher did you? Had you done so you would not make such obvious
errors.

rossum

.



Relevant Pages

  • Re: Chosen plaintext attacks
    ... they do not resist a known plaintext attack. ... Your ignorance is showing. ... plaintext of an OTP you can just XOR to reveal the XOR ... the ability to resist that helps us separate the secure stream cyphers ...
    (sci.crypt)
  • Re: commutative property of algorithms
    ... almost all modern block cyphers are probably not a group and certainly ... Stream cyphers often are commutative, ... ciphers and OTP forming a group. ... Concerning AES, for example since I am somewhat rusty on it these ...
    (sci.crypt)