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The estimated strength of the encryption corresponds to about 60-80 bits for common symmetrical ciphers (see [http://www.faqs.org/rfcs/rfc3526.html RFC3526] chapter 8). This is quite low for today's standards but one has to keep in mind that this protocol wasn't designed as a secure transport protocol but as 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 and the required D-H keys to achieve a security equal to AES would have been much bigger or require [[elliptic curve cryptography]], making the handshake more expensive in terms of used CPU time.
==BBC claims==
A [[Newsnight|BBC Newsnight]] episode [http://www.mininova.org/tor/237324] claimed using encrypted BitTorrent will help terrorists and pedophiles because it is generating more encrypted traffic, making the internet harder to spy on. Many BitTorrent users were outraged and complained. [http://news.bbc.co.uk/1/hi/programmes/newsnight/4676926.stm#bittorrent] BBC applogised later, claiming that traditional media like television is under threat from new media like BitTorrent. [http://news.bbc.co.uk/2/hi/programmes/newsnight/4758636.stm]
==Note==
#{{note|name}} - It is usually referred to as the more correct ''protocol header encryption'' instead.
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