{"id":103974,"date":"2022-05-07T03:36:41","date_gmt":"2022-05-07T01:36:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-novoj-stabilnoj-vetki-tor-0-4-7"},"modified":"2022-05-07T03:36:41","modified_gmt":"2022-05-07T01:36:41","slug":"vypusk-novoj-stabilnoj-vetki-tor-0-4-7","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/news\/vypusk-novoj-stabilnoj-vetki-tor-0-4-7","title":{"rendered":"Release of the new stable branch Tor 0.4.7","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"
The release of Tor toolset version 0.4.7.7 has been announced, which is used to organize the operation of the anonymous Tor network. Version 0.4.7.7 is recognized as the first stable release of the 0.4.7 branch, which has been in development for the past ten months. The 0.4.7 branch will be supported as part of the standard maintenance cycle \u2013 the release of updates will be halted in 9 months or 3 months after the release of branch 0.4.8.x. <\/p>\n
Key changes in the new branch: <\/p>\n
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The implementation of the Round Trip Time (RTT) Congestion Control protocol has been added, regulating traffic through the Tor network (between the client and the exit node or onion service). The protocol aims to reduce the size of queues at relays and overcome current bandwidth limitations. Until now, the speed of a single upload stream through exit nodes and onion services was capped at 1 MB\/sec, as the sending window has a fixed size of 1000 cells per stream, and in each cell, up to 512 bytes of data can be sent (stream speed with 0.5 sec latency in the chain = 1000*512\/0.5 = ~1 MB\/sec).\n
To forecast the available bandwidth and determine packet queue size, the new protocol uses Round Trip Time (RTT) estimation. Simulations have shown that the implementation of the new protocol at exit nodes and onion services will lead to reduced queuing delays, the removal of flow speed limits, increased Tor network performance, and more optimal use of available bandwidth. On the client side, flow control support will be offered on May 31 in the next major release of Tor Browser, built on the Tor 0.4.7 branch. <\/p>\n
A simplified Vanguards-lite protection has been added to prevent deanonymization attacks on short-lived onion services, reducing the risk of identifying the guard nodes of the onion service or onion client, in cases where the service operates for less than a month (for onion services that run for more than a month, it is recommended to use the vanguards add-on). The essence of the method is that onion clients and services automatically select 4 long-running guard nodes (\"layer 2 guard relay\") to use in the middle of the chain, and these nodes are maintained for a random period (on average, a week).\n