A memory includes a license region and a data region. Licenses (license ID, license key Kc, access control information ACm and reproduction time control information ACp) are stored in the license region. The license ID includes a content ID. A license administration file including information other than...http://www.google.com.au/patents/US20020136405?utm_source=gb-gplus-sharePatent US20020136405 - Data recording device allowing obtaining of license administration information from license region
