Talk:Chosen-plaintext attack

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I removed the 'foo' and 'bar' things; i'm didn't think hybrid cryptosystems were inherently less susceptible to chosen-plaintext attacks than a symmetric-key system. Matt 13:16, 11 Mar 2004 (UTC)

[edit] Abbreviation

Should not all the instances of chosen-plaintext attack be replaced with CPA? Otherwise, should the abbreviation not be mentioned at all?

[edit] Known-plaintext attack vs. Chosen-plaintext attack

I'm a little confused. What exactly is the difference between a Known-plaintext attack and a Chosen-plaintext attack? As far as I understood the articles, both attacks rely on the ability to somehow get encrypted versions of a chosen text. Are they perhaps the same attack and the articles should be merged? If not, could someone more knowledgeable add a sentence explaining the difference? -- Drangon 19:43, 2 February 2007 (UTC)

The difference is exactly that implied by the words; the attacker chooses chosen plaintexts, but has no control over known plaintexts. It can certainly be easier to find out a plaintext and corresponding ciphertext than to get someone to encrypt the plaintext of your choice. Ntsimp 03:38, 3 February 2007 (UTC)

One thing that may indeed be confusing is that "gardening" is used as an example for a known-plaintext attack as well as an example for a chosen-plaintext attack. Since the Enigma could be broken with known plaintext it seems that we should find a better example for chosen-plaintext attacks. 85.0.106.171 05:28, 3 February 2007 (UTC)

Thanks for the explanation. Looking back at the article, it seems kinda obvious now... ("attacker has the capability to choose arbitrary plaintexts") -- Drangon 14:36, 3 February 2007 (UTC)