Semiconductor memory card that records contents for trial and purchase, and recording apparatus, recording and reproducing apparatus, and sales method for the same

Abstract

A recording medium which allows consumers to access and purchase content while protecting the copyright of the content. The recording medium includes a secure data area and a non-secure data area. The secure data area is accessible by an apparatus whose authenticity is verified, and the non-secure area is accessible by the apparatus regardless of such verification. The secure data area stores a first content key. The non-secure data area stores first data and second data which can be decrypted. The first data includes a first encrypted content which is generated by encrypting a first content with the first content key, and the second data includes a second encrypted content which is generated by encrypting a second content with a second content key, where the first and second contents are related to each other.

1 . A recording medium that comprises a secure data area and a non-secure data area, the secure data area being accessible by an apparatus if authenticity of the apparatus is verified, and the non-secure data area being accessible by the apparatus regardless of whether the authenticity is verified, 
 wherein the secure data area stores a first content key, and    the non-secure data area stores first data, which is able to be decrypted by using information in the recording medium, and second data, which is able to be decrypted by using information both inside and outside of the recording medium,    the first data including a first encrypted content that is generated by encrypting a first content using the first content key, and    the second data including a second encrypted content that is generated by encrypting a second content using a second content key, the second content being related to the first content.    
     
     
         2 . The recording medium of  claim 1 , 
 wherein the second data further includes a second encrypted content key that is generated by encrypting the second content key according to a predetermined method, the second encrypted content key being to be decrypted using a decryption key that is obtained from the outside of the recording medium.    
     
     
         3 . The recording medium of  claim 2 , wherein the second data further includes encrypted management information, 
 a part of the encrypted management information being the second encrypted content key and a remaining part of the encrypted management information including a vendor ID and a usage condition, the vendor ID being uniquely assigned to a vendor that records the first data and the second data in the recording medium, and the usage condition including a purchase price of the second data.    
     
     
         4 . The recording medium of  claim 2 , 
 wherein the second data further includes encrypted management information,    a part of the encrypted management information being the second encrypted content key and a remaining part of the encrypted management information including a usage condition concerning the second data, the usage condition including a number of check outs allowed and a reproduction allowance, each check out being a conversion of the second data into a format in which the second data is able to be decrypted according to the information in the recording medium, and the reproduction allowance showing whether an apparatus that performs processing for the second data is allowed to reproduce the second data.    
     
     
         5 . A recording apparatus that records data in a recording medium that comprises a secure data area and a non-secure data area, the secure data area being accessible by an apparatus if authenticity of the apparatus is verified, and the non-secure data area being accessible by the apparatus regardless of whether the authenticity is verified, 
 the recording apparatus comprising:    a content storage unit operable to store a plurality of contents;    a content key generating unit operable to generate a plurality of content key used to encrypt the plurality of contents;    a first recording unit operable to record the first content key, which has been generated by the content key generating unit, in the secure data area;    a first encryption unit operable to read a first content, out of the plurality of contents, from the content storage unit and generate a first encrypted content by encrypting the first content using the first content key;    a second recording unit operable to record data including the first encrypted content in the non-secure data area as first data;    a second encrypted content key generating unit operable to generate a second encrypted content key by encrypting a second content key, out of the plurality of content key;    a second encryption unit operable to read a second content related to the first content from the content storage unit and generate a second encrypted content by encrypting the second content using the second content key; and    a third recording unit operable to record data including the second encrypted content in the non-secure data area as second data.    
     
     
         6 . The recording apparatus of  claim 5 , 
 wherein the data recorded by the third recording unit includes the second encrypted content key in addition to the second encrypted content.    
     
     
         7 . A recording and reproducing apparatus that records and reproduces data in a recording medium that comprises a secure data area and a non-secure data area, the secure data area being accessible by an apparatus if authenticity of the apparatus is verified, and the non-secure data area being accessible by the apparatus regardless of whether the authenticity is verified, 
 wherein the secure data area stores a first encrypted content key that is generated by encrypting a first content key using information in the recording medium, and    the non-secure data area stores first data, which is able to be decrypted by using information in the recording medium, and second data, which is able to be decrypted by using information both inside and outside of the recording medium,    the first data including a first encrypted content that is generated by encrypting a first content using the first content key, and    the second data including a second encrypted content that is generated by encrypting a second content using a second content key, the second content being related to the first content,    wherein the second data further includes a second encrypted content key that is generated by encrypting the second content key according to a predetermined method, the second encrypted content key being to be decrypted using a decryption key that is obtained from the outside of the recording medium, wherein the recording and reproducing apparatus comprises:    a data reading unit operable to read the second from the non-secure data area;    a second data storage unit operable to store the read second data;    a second decrypted content key generating unit operable to generate a second decrypted content key by decrypting the second encrypted content key included in the stored second data using a prestored decryption key;    a decrypted content generating unit operable to generate a decrypted content by decrypting the second encrypted content included in the stored second data using the second decrypted content key;    a reproducing unit operable to reproduce and output the decrypted content;    an encryption recording unit operable to generate a second encrypted content key by encrypting the second decrypted content key using information in a destination recording medium and record the second encrypted content key in the secure data area of the destination recording medium; and    a content recording unit operable to record the second encrypted content included in the stored second data in a non-secure data area of the destination recording medium.    
     
     
         8 . The recording and reproducing apparatus of  claim 7 , 
 wherein the second data further includes encrypted management information,    a part of the encrypted management information being the second encrypted content key and a remaining part of the encrypted management information including a usage condition concerning the second data, the usage condition including a number of check outs allowed and a reproduction allowance, each check out being a conversion of the second data into a format in which the second data is able to be decrypted according to the information in the recording medium, and the reproduction allowance showing whether an apparatus that performs processing for the second data is allowed to reproduce the second data,    wherein the recording and reproducing apparatus further comprises:    a usage condition storage unit operable to store a usage condition included in decrypted management information;    a first judging unit operable to judge whether a user's instruction designates a reproduction or recording of the stored second data;    a second judging unit operable to judge whether the stored usage condition shows that the reproduction is allowed, if the first judging unit has judged that the user's instruction designates the reproduction;    a reproduction control unit operable to activate the decrypted content generating unit and the reproducing unit if the second judging unit has judged that the reproduction is allowed;    a third judging unit operable to judge whether the recording is allowed by referring to the stored usage condition, if the first judging unit has judged that the user's instruction designates the recording;    a recording control unit operable to activate the encryption recording unit and the content recording unit if the third judging unit has judged that the recording is allowed; and    a displaying unit operable to display a message for the user if the second judging unit has judged that the reproduction is not allowed or if the third judging unit has judged that the recording is not allowed.    
     
     
         9 . The recording and reproducing apparatus of  claim 8 , wherein the third judging unit judges that the recording is allowed if the number of check outs allowed, which is included in the stored usage condition, is at least one, 
 the recording and reproducing apparatus further comprising:    an updating unit operable to decrement the included number of check outs allowed by one, after the content recording unit records the second encrypted content in the non-secure data area.    
     
     
         10 . A sales method for a recording medium that comprises a secure data area and a non-secure data area, the secure data area being accessible by an apparatus if authenticity of the apparatus is verified, and the non-secure data area being accessible by the apparatus regardless of whether the authenticity is verified, 
 wherein the secure data area stores a first encrypted content key that is generated by encrypting a first content key using information in the recording medium, and    the non-secure data area stores first data, which is able to be decrypted by using information in the recording medium, and second data, which is able to be decrypted by using information both inside and outside of the recording medium,    the first data including a first encrypted content that is generated by encrypting a first content using the first content key, and    the second data including a second encrypted content that is generated by encrypting a second content using a second content key, the second content being related to the first content,    wherein the second data further includes a second encrypted content key that is generated by encrypting the second content key according to a predetermined method, the second encrypted content key being to be decrypted using a decryption key that is obtained from the outside of the recording medium,    wherein the second data further includes encrypted management information,    a part of the encrypted management information being the second encrypted content key and a remaining part of the encrypted management information including a vendor ID and a usage condition, the vendor ID being uniquely assigned to a vendor that records the first data and the second data in the recording medium, and the usage condition including a purchase price of the second data,    wherein via a public line network, a fee processing apparatus is connected to a recording and reproducing apparatus that comprises:    a data reading unit operable to read the second data from the non-secure data area;    a second data storage unit operable to store the read second data;    a second decrypted content key generating unit operable to generate a second decrypted content key by decrypting the second encrypted content key included in the stored second data using a prestored decryption key;    a decrypted content generating unit operable to generate a decrypted content by decrypting the second encrypted content included in the stored second data using the second decrypted content key;    a reproducing unit operable to reproduce and output the decrypted content;    an encryption recording unit operable to generate a second encrypted content key by encrypting the second decrypted content key using information in the recording medium and record the second encrypted content key in the secure data area of a destination recording medium; and    a content recording unit operable to record the second encrypted content included in the stored second data in a non-secure data area of the destination recording medium,    wherein the sales method comprises:    a storing step where when reproducing or recording a content included in the second data for a first time, the recording and reproducing apparatus stores fee processing information that includes a purchase price for the content;    a transmission step where the recording and reproducing apparatus transmits, to the fee processing apparatus, the fee processing information, a terminal ID prestored in the recording and reproducing apparatus, and a vendor ID;    a calculating step where the fee processing apparatus calculates a contribution degree for each vendor from a piece of the fee processing information that corresponds to a vendor ID assigned to the vendor; and    a determining step where the fee processing apparatus determines a share of a profit to be paid to the vendor according to the calculated contribution degree.    
     
     
         11 . A program applied to a recording and reproducing apparatus that records and reproduces data in a recording medium that comprises a secure data area and a non-secure data area, the secure data area being accessible by an apparatus if authenticity of the apparatus is verified, and the non-secure data area being accessible by the apparatus regardless of whether the authenticity is verified, 
 wherein the secure data area stores a first encrypted content key that is generated by encrypting a first content key using information in the recording medium, and    the non-secure data area stores first data, which is able to be decrypted by using information in the recording medium, and second data, which is able to be decrypted by using information both inside and outside of the recording medium,    the first data including a first encrypted content that is generated by encrypting a first content using the first content key, and    the second data including a second encrypted content that is generated by encrypting a second content using a second content key, the second content being related to the first content,    wherein the second data further includes a second encrypted content key that is generated by encrypting the second content key according to a predetermined method, the second encrypted content key being to be decrypted using a decryption key that is obtained from the outside of the recording medium,    wherein the program has the recording and reproducing apparatus achieve the following units:    a data reading and storing unit operable to read the second data from the non-secure data area and store the read second data in a recording area;    a second decrypted content key generating unit operable to generate a second decrypted content key by decrypting the second encrypted content key included in the stored second data using a prestored decryption key;    a decrypted content generating unit operable to generate a decrypted content by decrypting the second encrypted content included in the stored second data using the second decrypted content key;    a reproducing unit operable to reproduce and output the decrypted content;    an encryption recording unit operable to generate a second encrypted content key by encrypting the second decrypted content key using information in the recording medium and record the second encrypted content key in the secure data area of a destination recording medium; and    a content recording unit operable to record the second encrypted content included in the stored second data in a non-secure data area of the destination recording medium.    
     
     
         12 . A computer-readable recording medium applied to a recording and reproducing apparatus that records and reproduces second data in a recording medium that comprises a secure data area and a non-secure data area, the secure data area being accessible by an apparatus if authenticity of the apparatus is verified, and the non-secure data area being accessible by the apparatus regardless of whether the authenticity is verified, 
 wherein the secure data area stores a first encrypted content key that is generated by encrypting a first content key using information in the recording medium, and    the non-secure data area stores first data, which is able to be decrypted by using information in the recording medium, and second data, which is able to be decrypted by using information both inside and outside of the recording medium,    the first data including a first encrypted content that is generated by encrypting a first content using the first content key, and    the second data including a second encrypted content that is generated by encrypting a second content using a second content key, the second content being related to the first content,    wherein the second data further includes a second encrypted content key that is generated by encrypting the second content key according to a predetermined method, the second encrypted content key being to be decrypted using a decryption key that is obtained from the outside of the recording medium,    wherein the computer-readable recording medium stores a program having the recording and reproducing apparatus achieve the following units:    a data reading and storing unit operable to read the second data from the non-secure data area and store the read second data in a recording area;    a second decrypted content key generating unit operable to generate a second decrypted content key by decrypting the second encrypted content key included in the stored second data using a prestored decryption key;    a decrypted content generating unit operable to generate a decrypted content by decrypting the second encrypted content included in the stored second data using the second decrypted content key;    a reproducing unit operable to reproduce and output the decrypted content;    an encryption recording unit operable to generate a second encrypted content key by encrypting the second decrypted content key using information in the recording medium and record the second encrypted content key in the secure data area of a destination recording medium; and    a content recording unit operable to record the second encrypted content included in the stored second data in a non-secure data area of the destination recording medium.