Data control system

A data copying apparatus comprising;

• means for detecting from data a control flag indicating to effect copying control of the data which is embedded using an electronic watermarking technique,
• means for reading out said token indicating copying control information of the data from said data when said control flag is detected, and
• means for effecting copying control of said data according to a predefined control rule of said token or said control flag.

A data play-back apparatus comprising;

• means for detecting from data a control flag indicating to effect play-back control of the data which is embedded in the data using an electronic watermarking technique,
• means for reading said token indicating play-back control information of the data from said data when said control flag is detected, and
• means for effecting play-back control of said data according to a predefined control rule of said token or said control flag.

A data receiving apparatus comprising;

• means for detecting from data a control flag indicating receiving control information of the data which is embedded using an electronic watermarking technique,
• means for reading said token indicating receiving control information of the data from said data when said control flag is detected, and
• means for effecting receiving control of said data according to a predefined control rule of said token or said control flag.

A data control apparatus comprising;

• means for detecting from data a control flag indicating to effect control of the data which is embedded in the data using an electronic watermarking technique,
• means for reading said token indicating how to control the data from said data when said control flag is detected, and
• means for effecting control of said data according to a predefined control rule of said token or said control flag.

A token preparation apparatus preparing a token for effecting data control comprising;

• means for embedding in the data a control flag indicating to effect control of the data using an electronic watermarking technique,
• means for preparing a token having information as to how to control the data using the content of said data, and
• means for appending said token to said data.

A data control system of claims in which said control is a control of copying, play-back or receiving.

A token preparation apparatus preparing a token for effecting data control comprising;

• means for embedding in the data a control flag indicating to effect control of the data using an electronic watermarking technique,
• means for preparing a token having information as to how to control the data using the content of said data, and
• means for appending said token to said data.

A medium containing a program for effecting control of data, said program comprising;

• a function for detecting from data a control flag indicating to effect control of the data which is embedded in said data using an electronic watermarking technique,
• a function for reading out said token indicating how to effect control of the data from said data when said control flag is detected, and
• a function for effecting control of said data according to a predefined control rule of said token or said control flag.

A medium containing a program containing a program for preparing a token for data control, said program comprising;

• a function for embedding a control flag indicating to effect data control in the data using an electronic watermarking technique,
• a function for preparing a token having information as to how to control the data by using the content of said data, and
• a function for appending said token to said data.

A token preparation apparatus for effecting copying control of digital content comprising;

• means for embedding a control flag indicating to permit copying of the digital content in the digital content using an electronic watermarking technique,
• means for preparing a token having information to effect copying control of said digital content from said digital content by using a one-way function, and
• means for appending said token to said data.

A data control apparatus comprising;

• means for detecting from data a control flag embedded in said data by watermarking, said flag indicating that a control of data is to be effected,
• means for reading out from said data a token indicating control information of data when said control flag is detected, and
• means for controlling said data according to a predefined control rule of said token or said control flag based on input information from the exterior.

A data control apparatus comprising;

• means for receiving a control flag and a token embedded in said data by watermarking, said flag indicating that a control of data is to be effected and said token indicating control information of data, and
• means for controlling said data according to a predefined control rule of said token or said control flag based on input information from the exterior.