Method and device for generating a key used to control information on information carrier

本发明披露了一种用于产生用来控制访问信息载体(1)上的信息的密钥(18)的方法和读/写装置。所述密钥包括M位主密钥(12)和信息载体密钥(2)。所述装置适用于在信息载体(1)上读/写信息。所述装置还适用于产生M位主密钥(12)。信息载体密钥(2)被从信息载体中读出。M位主密钥(12)通过根据标识符R确定数p，并通过从由数p确定的位置中读出N位串(11)被导出。用这种方式，可以阻止信息从一个信息载体被非法复制到另一个信息载体上。 A key is generated to control the access to information on an information carrier. T...

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Bibliographic Details
Main Author A.A.M. STARING
Format Patent
LanguageChinese
English
Published 09.06.2004
Edition7
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:本发明披露了一种用于产生用来控制访问信息载体(1)上的信息的密钥(18)的方法和读/写装置。所述密钥包括M位主密钥(12)和信息载体密钥(2)。所述装置适用于在信息载体(1)上读/写信息。所述装置还适用于产生M位主密钥(12)。信息载体密钥(2)被从信息载体中读出。M位主密钥(12)通过根据标识符R确定数p，并通过从由数p确定的位置中读出N位串(11)被导出。用这种方式，可以阻止信息从一个信息载体被非法复制到另一个信息载体上。 A key is generated to control the access to information on an information carrier. The key is derived from an M-bit master key and an information carrier key. Apparatus to read and/or write information on an information carrier generates the M-bit master key. The information carrier key is derived from the information carrier. The M-bit master key is derived from only a part of an N-bit string, the part being determined by a number p derived from an identifier R associated with recording information on the information carrier.
Bibliography:Application Number: CN19998004156