What is Twofish? Is Twofish secure?

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Twofish is the successor to?Blowfish, and, like its predecessor, uses symmetric encryption, so only one 256-bit key is necessary. This technique is one of the fastest?encryption algorithms?and is ideal for both hardware and software environments. When it was released, it was a finalist for the National Institute of Technology and Science’s (NIST’s) competition to find a replacement for the Data Encryption Standard (DES) encryption algorithm. In the end, the Rjindael algorithm was selected over the Twofish encryption algorithm. Similar to Blowfish, a block cipher is used in this symmetric encryption algorithm.