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Paillier cryptosystem - Wikipedia python-paillier a library for Partially Homomorphic Encryption in Python, including full support for floating point numbers The Paillier cryptosystem interactive simulator Archived 2012-02-18 at the Wayback Machine demonstrates a voting application An interactive demo of the Paillier cryptosystem
Tiny Encryption Algorithm - Wikipedia In cryptography, the Tiny Encryption Algorithm (TEA) is a block cipher notable for its simplicity of description and implementation, typically a few lines of code
Affine cipher - Wikipedia Encryption In this encrypting example, [1] the plaintext to be encrypted is "AFFINE CIPHER" using the table mentioned above for the numeric values of each letter, taking a to be 5, b to be 8, and m to be 26 since there are 26 characters in the alphabet being used Only the value of a has a restriction since it has to be coprime with 26
XOR cipher - Wikipedia In cryptography, the simple XOR cipher is a type of additive cipher, [1] an encryption algorithm that operates according to the principles: A 0 = A, A A = 0, A B = B A, (A B) C = A (B C), (B A) A = B 0 = B For example where denotes the exclusive disjunction (XOR) operation [2] This operation is sometimes called modulus 2 addition (or subtraction, which is identical) [3] With this logic, a
Format-preserving encryption - Wikipedia Format-preserving encryption In cryptography, format-preserving encryption (FPE), refers to encrypting in such a way that the output (the ciphertext) is in the same format as the input (the plaintext) The meaning of "format" varies Typically only finite sets of characters are used; numeric, alphabetic or alphanumeric For example:
Block cipher mode of operation - Wikipedia Six common block cipher modes of operation for encrypting In cryptography, a block cipher mode of operation is an algorithm that uses a block cipher to provide information security such as confidentiality or authenticity [1] A block cipher by itself is only suitable for the secure cryptographic transformation (encryption or decryption) of one fixed-length group of bits called a block [2] A
AES implementations - Wikipedia Rijndael is free for any use public or private, commercial or non-commercial [1] The authors of Rijndael used to provide a homepage [2] for the algorithm Care should be taken when implementing AES in software, in particular around side-channel attacks The algorithm operates on plaintext blocks of 16 bytes Encryption of shorter blocks is possible only by padding the source bytes, usually
NTRU - Wikipedia NTRU is an open-source public-key cryptosystem that uses lattice-based cryptography to encrypt and decrypt data It consists of two algorithms: NTRUEncrypt, which is used for encryption, and NTRUSign, which is used for digital signatures
Transposition cipher - Wikipedia Step-by-step process for the double columnar transposition cipher In cryptography, a transposition cipher (also known as a permutation cipher) is a method of encryption which scrambles the positions of characters (transposition) without changing the characters themselves Transposition ciphers reorder units of plaintext (typically characters or groups of characters) according to a regular