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, , is a that enables one to easily capture from other users communications with specific popular sites. The problem it exploits is that many sites protect the initial with , but then revert further communication to unsecured HTTP. This exposes any application session cookies employed by the site, and returned by users' browsers to the site on every request, to capture and replay [sulfamethoxazole 400mg pills > 30 pills > $54.00] by an attacker. This enables one to hang out on a local network, your favorite coffee shop for instance, and hijack others' interactions with various social networking sites and retailers, for example. This particular class of typical website vulnerability has been known for ages, as well as techniques for addressing it. For example, websites can simply offer their entire site over TLS/SSL (i. e. via ""), as does. Some sites do so, but for whatever reason still revert users sulfamethoxazole 400mg pills > 30 pills > $54.00 communications to unsecured HTTP by default, or some portion of their communications remain unsecured. However, if one can configure one's browser to only securely interact with some given site (i. e. domain), and if the site supports this, then Problem Largely Solved. See, for example, and 's paper, , for a description of this class of vulnerabilities, attacks, and remediation approaches. I've been working with Collin and Adam on standardizing ForceHTTPS -- their paper was the inspiration for the and the present , and thus the and plugins), natively in Firefox 4 beta 6 and later, and natively in Chrome 4 and later. Sulfamethoxazole 400mg pills > 30 pills > $54.00 there's also the extension from the that comes pre-loaded with a list of sites to use only via https, and is configurable such that one can add more (unfortunately it doesn't support hsts apparently). . Now sulfamethoxazole 400mg pills > 30 pills > $54.00, HSTS is a website security policy that in typical cases, sites will explicitly signal to browsers (via an ), as PayPal presently does. However, this week, , who authored the and native implementation, conzed-up a new Firefox v4 add-on, , that allows one to configure one's browser to regard given sites as HSTS sites, even if they don't signal it. This also addresses the . Note that , and that NoScript (FF v3 & v4), HTTPS-Everywhere (FFv3), and Force-TLS (FFv3) all facilitate user configuration of HTTPS-only sites. We'll be working in the new to finish the HSTS draft spec and get it published as an , hopefully before too much of 2011 is gone. I'll try to keep you all updated on that. In the meantime, =JeffH sez be careful with your web logins :) updated 31-Oct-2010: Added NoScript and HTTPS-Everywhere. Apologies to and the for not including them straight away.