Google, Microsoft, and Mozilla all made the same announcement today: They will drop support for the RC4 cipher in their respective browsers. Chrome, Edge, Internet Explorer, and Firefox will all ...

RC4, being a stream-cipher mechanism, means that it generates a key stream that is the same length as the data stream. So 200 bytes of data would generate 200 bytes of a key stream, which is a ...

TLS, the successor of SSL, offers a choice of ciphers, but versions 1.0 and 1.1 of the protocol support only block ciphers that operate in cipher-block chaining (CBC) mode and the RC4 stream cipher.

The RC4 stream cipher, the SHA-1 hash function, and old export ciphers are also out of the specification. Together, these banned features have been the source for most of TLS’ security woes in ...

In recent years, researchers demonstrated attacks against TLS configurations that use the RC4 stream cipher or block ciphers like AES that operate in cipher-block-chaining (CBC) mode.

While it theoretically affects all SSL/TLS ciphers, their version of the attack was most effective against connections encrypted with stream ciphers, such as RC4.

Microsoft released optional security updates Tuesday for various versions of the .NET Framework that prevent the RC4 encryption algorithm from being used in TLS (Transport Layer Security) connections.

On January 5, 2015 GitHub’s web encryption protocol will drop support for RC4 — an older suite of authentication and encryption algorithms with a number of known vulnerabilities.