BitTorrent protocol encryption: Difference between revisions

Revision as of 01:36, 28 April 2016

Revision as of 01:38, 28 April 2016

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==Security==

The estimated strength of the encryption corresponds to about 60–80 bits for common symmetrical ciphers.<ref>{{cite web|url=http://tools.ietf.org/html/rfc3526#section-8|title=RFC 3526 chapter 8 |publisher=IETF.org}}</ref> Cryptographically, this effective key length is quite low, but appropriate in that the protocol was not designed as a secure transport protocol but rather as a fast and efficient obfuscation method. [[Advanced Encryption Standard|AES]] was proposed as the encryption method, but not adopted because it consumed too much CPU time. The required [[Diffie-Hellman key exchange|Diffie–Hellman]] keys to achieve a security equal to AES would have been much bigger or requiredrequire [[elliptic curve cryptography]], making the handshake more expensive in terms of used CPU time.

== Effectiveness ==