Data converter, data conversion method and program

A data conversion method being a data conversion process method executed by a data converter, the data conversion method comprising:

• a data conversion step of receiving message data to generate a hash value by a data conversion section, the data conversion step being a step of executing a data conversion process with use of a plurality of compression-function execution sections and through a plurality of respective process sequences in which a plurality of divided data blocks constituting the message data are processed in parallel,
• wherein each of the plurality of compression-function execution sections perform:
• a process with use of a message scheduling section which receives a corresponding divided data block of the message data to perform a message scheduling process;
• and
• a process with use of a chaining variable processing section which receives both of an output from the message scheduling section and an intermediate value as an output from a preceding processing section to generate output data whose number of bits is same as that of the intermediate value through compression of received data, and
• the plurality of compression-function execution sections, respectively performing parallel processing in the plurality of process sequences, commonly use one or both of the message scheduling section and the chaining variable processing section, and perform a process with use of a single message scheduling section or a single chaining variable processing section.

A program executing a data conversion process in a data converter, the program comprising:

• a data conversion step of receiving message data to generate a hash value by a data conversion section, the data conversion step being a step of executing a data conversion process with use of a plurality of compression-function execution sections and through a plurality of process sequences in which a plurality of divided data blocks constituting the message data are processed in parallel,
• wherein the program allows each of the plurality of compression-function execution sections to execute:
• a process with use of a message scheduling section which receives a corresponding divided data block of the message data to perform a message scheduling process;
• and
• a process with use of a chaining variable processing section which receives both of an output from the message scheduling section and an intermediate value as an output from a preceding processing section to generate output data whose number of bits is same as that of the intermediate value through compression of received data, and
• the program allows the plurality of compression-function execution sections, respectively performing parallel processing in the plurality of process sequences, to commonly use one or both of the message scheduling section and the chaining variable processing section, and to perform a process with use of a single message scheduling section or a single chaining variable processing section.