rTorrent supports MSE/PE as of rTorrent-0.7.0.libtorrent implemented protocol encryption in v0.13 released on 10 December 2011.KTorrent implemented MSE/PE in SVN version 535386 on April 29, 2006.Deluge supports MSE/PE as of Deluge-0.5.1.BitTorrent (Mainline) supports MSE/PE since version 4.9.2-beta on May 2, 2006.As of January 5, 2007, this build is still marked "experimental" on the Download page. BitTornado supports MSE/PE as of build T-0.3.18.It removed the old protocol header encryption and implemented the new MSE/PE to be compatible with Azureus and μTorrent. BitComet version 0.63 was released 7 March 2006.aria2 supports MSE/PE as of build v1.34 but is not enforced by default.In μTorrent, the new protocol was called protocol encryption (PE). After negotiations between different BitTorrent developers a new proposal was written and then implemented into the Azureus and μTorrent betas within days. This first draft was heavily criticized since it lacked several key features. It was included in Azureus CVS snapshot 2307-B29 on 19 January 2006. In late January 2006 the developers of Vuze (then known as Azureus) decided to design and simultaneously implement a new, open protocol obfuscation method, called message stream encryption (MSE). Since there are no open specifications to this protocol implementation the only possibility to support it in other clients would have been via reverse engineering. PHE is detectable because only part of the stream is encrypted. Some software like IPP2P claims BitComet traffic is detectable even with PHE. Protocol header encryption (PHE) was conceived by RnySmile and first implemented in BitComet version 0.60 on 8 September 2005. These systems were designed initially to provide anonymity or confidentiality, but became required in countries where Internet Service Providers were granted the power to throttle BitTorrent users and even ban those they believed were guilty of illegal file sharing. ![]() Obfuscation and encryption make traffic harder to detect and therefore harder to throttle. Some ISPs deal with this traffic by increasing their capacity whilst others use specialised systems to slow peer-to-peer traffic to cut costs. 2.3 MSE/PE in BitTorrent client versionsĪs of January 2005, BitTorrent traffic made up more than a third of total residential internet traffic, although this dropped to less than 20% as of 2009.
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