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HSTS addresses this problem [2]: §2.4 by informing the browser that connections to the site should always use TLS/SSL. The HSTS header can be stripped by the attacker if this is the user's first visit. Google Chrome, Mozilla Firefox, Internet Explorer, and Microsoft Edge attempt to limit this problem by including a "pre-loaded" list of HSTS sites.
The server communicates the HPKP policy to the user agent via an HTTP response header field named Public-Key-Pins (or Public-Key-Pins-Report-Only for reporting-only purposes).
This class of status code indicates the client must take additional action to complete the request. Many of these status codes are used in URL redirection. [2]A user agent may carry out the additional action with no user interaction only if the method used in the second request is GET or HEAD.
Mozilla Firefox (Firefox for mobile) [n 17] 1.0, 1.5 Windows (10+) macOS (10.15+) Linux Android (5.0+) iOS (15+) Firefox OS Maemo ESR 115 only for: Windows (7–8.1) macOS (10.12–10.14) ESR 128+ only for: Windows (10+) macOS (10.15+) Linux: Yes [30] Yes [30] Yes [30] No No No No Yes [2] No Not affected [31] Not affected Vulnerable Vulnerable ...
Network Security Services (NSS), the cryptography library developed by Mozilla and used by its web browser Firefox, enabled TLS 1.3 by default in February 2017. [49] TLS 1.3 support was subsequently added — but due to compatibility issues for a small number of users, not automatically enabled [50] — to Firefox 52.0, which was released in ...
Alice and Bob have public key certificates issued by Carol, the certificate authority (CA).; Alice wishes to perform a transaction with Bob and sends him her certificate. Bob, concerned that Alice's private key may have been compromised, creates an 'OCSP request' that contains Alice's certificate serial number and sends it to Carol.
An example of Certificate Transparency entry on Firefox 89. In 2011, a reseller of the certificate authority Comodo was attacked and the certificate authority DigiNotar was compromised, [20] demonstrating existing flaws in the certificate authority ecosystem and prompting work on various mechanisms to prevent or monitor unauthorized certificate ...
First web browsers with SNI support appeared in 2006 (Mozilla Firefox 2.0, Internet Explorer 7), web servers later (Apache HTTP Server in 2009, Microsoft IIS in 2012). For an application program to implement SNI, the TLS library it uses must implement it and the application must pass the hostname to the TLS library.