The version 6.0 of Tor Browser, a free software for enabling anonymous communication, is now available to download. The new version introduces several changes, including disabling SHA-1 support, and removing Mac Gatekeeper issue. Another big change is that Tor now uses DuckDuckGo for search results by default. The Tor Project, people behind Tor, add that the "updater is not relying on the signature alone, but is checking the hash of the downloaded update file as well before applying it." More details on NetworkWorld.