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August 10, 2016 12:00 am
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/MpgzxV-2_jE/microsoft-disables-rc4-in-internet-explorer-11-and-edge
Microsoft Disables RC4 In Internet Explorer 11 and Edge
An anonymous reader quotes a report from WinBeta: Microsoft released KB3151631 as part of today's Patch Tuesday set of updates that will disable RC4 in both Internet Explorer 11 on Windows 7 and later and in the Edge browser on Windows 10. As the company describes things: "RC4 is a stream cipher that was first described in 1987, and has been widely supported across web browsers and online services. Modern attacks have demonstrated that RC4 can be broken within hours or days. The typical attacks on RC4 exploit biases in the RC4 keystream to recover repeatedly encrypted plaintexts. In February 2015, these new attacks prompted the Internet Engineering Task Force to prohibit the use of RC4 with TLS. Previously, Microsoft Edge and Internet Explorer 11 allowed RC4 during a fallback from TLS 1.2 or 1.1 to TLS 1.0. A fallback to TLS 1.0 with RC4 is most often the result of an innocent error, but this is indistinguishable from a man-in-the-middle attack. For this reason, RC4 is now entirely disabled by default for Microsoft Edge and Internet Explorer users on Windows 7, Windows 8.1 and Windows 10."Read more of this story at Slashdot.
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/MpgzxV-2_jE/microsoft-disables-rc4-in-internet-explorer-11-and-edge
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