| http://www.w3.org/ns/prov#value | - A data encryption apparatus for encrypting input data after dividing the input data into N blocks of data each consisting of M bits wherein N is an integer greater than 2 and M is an integer of 2 or more, the data encryption apparatus comprising:a first selection unit for selecting L blocks among the N blocks, L being an integer of 1 to N-2; a block selection information generation unit for genera
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