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The affine cipher is a type of monoalphabetic substitution cipher, where each letter in an alphabet is mapped to its numeric equivalent, encrypted using a simple mathematical function, and converted back to a letter. The formula used means that each letter encrypts to one other letter, and back again, meaning the cipher is essentially a ...
The Rail Fence cipher is a form of transposition cipher that gets its name from the way in which it is encoded. In the rail fence cipher, the plaintext is written downward and diagonally on successive "rails" of an imaginary fence, then moves up when it gets to the bottom.
Codes operated by substituting according to a large codebook which linked a random string of characters or numbers to a word or phrase. For example, "UQJHSE" could be the code for "Proceed to the following coordinates." When using a cipher the original information is known as plaintext, and the encrypted form as ciphertext. The ciphertext ...
Substitution Ciphers and the Aristocrat Cipher are still used in many ways today including storage encryption, password encryption, cyber security, etc. The most common of these is data encryption , where using the Encryption Algorithms you convert plaintext to ciphertext, allowing your data to be stored without easy exfiltration.
The table on the right is an aid for converting between plaintext and ciphertext using the characters at left as the key. In cryptography , the one-time pad ( OTP ) is an encryption technique that cannot be cracked , but requires the use of a single-use pre-shared key that is larger than or equal to the size of the message being sent.
The ROT13 and ROT47 are fairly easy to implement using the Unix terminal application tr; to encrypt the string "Pack My Box With Five Dozen Liquor Jugs" in ROT13: $ # Map upper case A-Z to N-ZA-M and lower case a-z to n-za-m $ tr 'A-Za-z' 'N-ZA-Mn-za-m' <<< "Pack My Box With Five Dozen Liquor Jugs" Cnpx Zl Obk Jvgu Svir Qbmra Yvdhbe Whtf
The Cryptographic Message Syntax (CMS) is the IETF's standard for cryptographically protected messages. It can be used by cryptographic schemes and protocols to digitally sign, digest, authenticate or encrypt any form of digital data.
The Web Cryptography API is the World Wide Web Consortium’s (W3C) recommendation for a low-level interface that would increase the security of web applications by allowing them to perform cryptographic functions without having to access raw keying material. [1]