Monday, October 14, 2013

The Breach Attack


Back in 2012, when Juliano Rizzo and Thai Duong announced the CRIME attack, a TLS / SSL Compression attack against HTTPS, the ability to recover selected parts of the traffic through side channel attacks was proven. This attack was mitigated by disabling the TLS / SSL level compression for most of the browsers. This year at Black Hat, a new attack called BREACH (browser reconnaissance and exfiltration via adaptive compression of hypertext) was announced and it commanded the attention of entire industry. This presentation, titled “SSL Gone in 30 seconds,” is not properly understood and hence there seems to be some confusion about how to mitigate the problem. So I felt that this article should give some detailed insight into how notorious the attack is, how it works, how practical it is, and what needs to be done to mitigate it. So let’s have a look
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