Triple DES

Triple DES (3DES) is the common name for the Triple Data Encryption Algorithm (TDEA or Triple DEA) symmetric-key block cipher, which applies the Data Encryption Standard (DES) cipher algorithm three times to each data block. It transforms each 64-bit plaintext block by applying the DES three successive times, using either two or three different keys, for an effective key length of 112 or 168 bits.