Transferring electronic content
First Claim
Patent Images
1. A method for transferring electronic content including multiple portions, comprising:
- providing electronic content to a first user via a first user'"'"'s smart card enabled device;
providing the first user with a first key packet useful by said first user'"'"'s smart card enabled device for decrypting said electronic content, said first key packet comprising a first main decryption key and a plurality of dependent decryption keys encrypted by said first main key, each of said plurality of dependent decryption keys being useful for decrypting at least one of said multiple portions of said electronic content, said first key packet being operative to enable creation of a second key packet, at said first user'"'"'s smart card enabled device, comprising a second main decryption key and said plurality of dependent decryption keys, at least some of which are encrypted by said second main key; and
transferring of said electronic content and said second key packet from the first user to a second user.
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Abstract
A method and apparatus for transferring electronic content. The method and apparatus include providing electronic content to a first user, providing the first user with a key packet, the key packet including a decryption key and content rights information, transferring the electronic content and the key packet from the first user to a second user and rendering rights of the first user to the electronic content unusable upon transfer of the electronic content and the key packet from the first user to the second user.
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Citations
14 Claims
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1. A method for transferring electronic content including multiple portions, comprising:
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providing electronic content to a first user via a first user'"'"'s smart card enabled device; providing the first user with a first key packet useful by said first user'"'"'s smart card enabled device for decrypting said electronic content, said first key packet comprising a first main decryption key and a plurality of dependent decryption keys encrypted by said first main key, each of said plurality of dependent decryption keys being useful for decrypting at least one of said multiple portions of said electronic content, said first key packet being operative to enable creation of a second key packet, at said first user'"'"'s smart card enabled device, comprising a second main decryption key and said plurality of dependent decryption keys, at least some of which are encrypted by said second main key; and transferring of said electronic content and said second key packet from the first user to a second user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus for transferring electronic content including multiple portions, comprising:
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a content provider for providing electronic content to a first user via a first user'"'"'s smart card enabled device; a key packet provider for providing the first user with a first key packet useful by said first user'"'"'s smart card enabled device for decrypting said electronic content, said first key packet comprising a first main decryption key and a plurality of dependent decryption keys encrypted by said first main key, each of said plurality of dependent decryption keys being useful for decrypting at least one of said multiple portions of said electronic content, said first key packet being operative to enable creation of a second key packet, at said first user'"'"'s smart card enabled device, comprising a second main decryption key and said plurality of dependent decryption keys, at least some of which are encrypted by said second main key; and a content transferor for transferring of said electronic content and said second key packet from the first user to a second user.
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14. Apparatus for transferring electronic content including multiple portions, comprising:
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means for providing electronic content to a first user via a first user'"'"'s smart card enabled device; means for providing the first user with a first key packet useful by said first user'"'"'s smart card enabled device for decrypting said electronic content, said first key packet comprising a first main decryption key and a plurality of dependent decryption keys encrypted by said first main key, each of said plurality of dependent decryption keys being useful for decrypting at least one of said multiple portions of said electronic content, said first key packet being operative to enable creation of a second key packet, at said first user'"'"'s smart card enabled device, comprising a second main decryption key and said plurality of dependent decryption keys, at least some of which are encrypted by said second main key; and means for transferring of said electronic content and said second key packet from the first user to a second user.
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Specification