Patent ID: 8224041

Claim:
A media data processing apparatus for producing encrypted media data from media data containing at least one image information, comprising: a biological feature extracting unit for extracting a feature of biological information which is related to at least one person contained in said image information from said media data inputted thereinto; an encrypting process unit for partially, or wholly encrypting said media data based upon the feature extracted by said biological feature extracting unit; and a personal information acquiring unit for acquiring information of a public key from the feature extracted by said biological feature extracting unit, said public key being previously allocated to a specific person corresponding to said feature, wherein said encrypting process unit encrypts said media data by employing information of a common key which has been previously prepared, or has been formed so as to produce first encrypted data, encrypts the information of said common key by employing the information of the public key acquired by said personal information acquiring unit so as to produce second encrypted data, and outputs encrypted data which contains both said first encrypted data and said second encrypted data.