![]() Triple DES, as the name suggests, works by encrypting data three times. ![]() William Shay, in Encyclopedia of Information Systems, 2003 VI.A.2. Standards and Protocols in Data Communications Note that “double DES” (applying DES encryption twice using two keys) is not used due to a meet-in-the-middle attack: see the “Cryptographic Attacks” section for more information. Triple DES has held up well after years of cryptanalysis the primary weakness is that it is slow and complex compared to newer symmetric algorithms such as AES or Twofish. FIPS 46-3 recommended single DES for legacy use only, due to the ever-lowering work factor required to break single DES. Formally called the “Triple Data Encryption Algorithm (TDEA) and commonly called TDES,” it became a recommended standard in 1999 by the United States Federal Information Processing Standard (FIPS) Publication 46-3 (see: ). Triple DES applies single DES encryption three times per block. Joshua Feldman, in CISSP Study Guide (Third Edition), 2016 Triple DES Domain 3: Security Engineering (Engineering and Management of Security)Įric Conrad.
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