Patent ID: 7849308
Filing Date: 2010-12-07
Classification: H04L

Abstract:
1. A data generating device comprising: a variable-length data input unit adapted to input variable-length data; an embedding unit adapted to embed identification data corresponding to format information indicating the format of the variable-length data to the variable-length data; an location information acquiring unit adapted to acquire location information showing locations corresponding to identification data in variable-length data; an outputting unit adapted to output the variable-length data in which the identification data is embedded and the location information, wherein the variable-length data comprises a public key certificate; and a data generating unit adapted to generate with a pre-determined length at least one set of data to be input by the variable-length data input unit, wherein the data generating unit calculates signature data based on signed data and corrected data and, if the bit length of the signature data is not the pre-determined length, generates signature data by repeating the calculation until signature data with the pre-determined length is obtained.