A null cipher is an ancient form of encryption where the plaintext is mixed with a large amount of non-cipher material. It would today be regarded as a simple form of steganography.Null ciphers can also be used to hide ciphertext, as part of a more complex system. In classical cryptography a null is intended to confuse the cryptanalyst.Typically, a null will be a character which decrypts to
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The handshake failure usually means there's no shared cipher suite: 2895:error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure SSL_NULL_WITH_NULL_NULL
Caesar cipher is best known with a shift of 3, all other shifts are possible. Some shifts are known with other cipher names. Another variant changes the alphabet, and introduce digits for example. A Caesar cipher with an offset of N corresponds to an Affine cipher Ax+B with A=1 and B=N. Directaccess 2012 PCI Compliance - Null Ciphers
The update to the priority order for cipher suites used for negotiating TLS 1.2 connections on JDK 8 will give priority to GCM cipher suites. GCM cipher suites are considered more secure than other cipher suites available for TLS 1.2. Later versions of the JDK already prefer GCM cipher suites before other cipher suites for TLS 1.2 negotiations.
SSL Null Cipher Suites Supported | Tenable® The remote service supports the use of null SSL ciphers. Description The remote host supports the use of SSL ciphers that offer no encryption at all. Note: This is considerably easier to exploit if the attacker is on the same physical network. Solution Reconfigure the affected application, if possible to avoid the use of null ciphers. See Also Cipher Identifier (online tool) | Boxentriq Secret messages can be hidden within plaintext, or something that looks like plaintext, using steganography techniques. Some of the most common steganigraphy techniques are the so called NULL cipher and the baconian cipher. Other possibilities are that the text is a riddle or using anagrams. Steganography; NULL Cipher tls - Is it safe to use TLS_RSA_WITH_NULL_SHA cipher