Recording medium, recorder, reproducer, cryptocommunication system and program license system
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMitsuaki Oshima, Yoshiho Gotoh, Shinichi Tanaka, Kenji Koishi, Mitsurou Moriya, Yoshinari Takemura
Life of this patent
Estimating the term…
Abstract
The operating and other procedures of a disk or recording medium application system of the type for which a network is used are simplified. Disks or recording media have auxiliary data recording areas, where different IDs for individual disks, and/or cipher keys and/or decoding keys for ciphers are recorded in advance in a factory. By using the IDs to release the soft ciphers, using the cipher keys when sending the ciphers, and using the decoding keys when receiving the ciphers, user authorization procedures are simplified.
Claims10
A content recording device comprising:
- input means for inputting a content,
- encrypting means for encrypting the input content, and
- recording means for recording the encrypted content,
- wherein after a validity of a recording medium based on a certain information is certified between the encrypting means and the recording means, the encrypted content is recorded by the recording means, and wherein the certain information is an information stored in the recording medium on which the encrypted content is recorded.
A content recording device comprising:
- input means for inputting a content,
- encrypting means for encrypting the input content,
- certifying means for certifying a validity of a recording medium based on a certain information between the encrypting means and a recording means,
- the recording means for recording the encrypted content after the validity of the recording medium is certified,
- wherein the certain information is information stored in the recording medium on which the encrypted content is recorded.
Dependencies are inferred from the claim text.