INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, AND PROGRAM

摘要

Speed-up of a cryptographic process by software (program) is realized. A data processing unit which executes a data process according to a program defining a cryptographic process sequence is included, and the data processing unit, according to the program, generates a bit slice expression data based on a plurality of plain text data items which are encryption process targets and a bit slice expression key based on a cryptographic key of each plain text data item, generates a round key based on the bit slice expression key, executes the cryptographic process including operation and movement processes of a block unit of the bit slice expression data, and an operation using the round key, and generates the plurality of encrypted data items corresponding to the plurality of plain text data items by the reverse conversion of the data with respect to the cryptographic process results.

主权项

1. An information processing apparatus comprising:
a data processing unit which executes a data process according to a program defining a cryptographic process sequence, wherein the data processing unit, according to the program, executes
a data conversion process of generating bit slice expression data by performing a bit slice process with respect to plain text data which is an encryption process target,a key conversion process of generating a bit slice expression key by performing a bit slice process with respect to each cryptographic key of the plain text data,a key scheduling process of inputting the bit slice expression key to generate a round key for each round of the cryptographic process,a cryptographic process in which the round key is applied with respect to the bit slice expression data, anda reverse data conversion process of generating encrypted data corresponding to the plain text data, by performing reverse conversion of the bit slice process with respect to the result of the cryptographic process, and executes the cryptographic process using an operation process and a movement process of a bit slice expression data block unit configured with the same orders of bits or bits at every n bits of each plain text data configuring the bit slice expression data in the cryptographic process, and herein n is a power of 2.