Systems and methods for content distribution using one or more distribution keys
First Claim
1. A multimedia content delivery system for sending predetermined content data from an information sending apparatus to an information receiving apparatus, wherein the information sending apparatus comprises:
- means for holding first identification information with an individual key, wherein the first identification information identifies the information sending apparatus and the individual key is unique to the information sending apparatus, and further wherein the first identification information with the individual key is encrypted by a distribution key that is unique to the information receiving apparatus;
means for adding second identification information to the content data, wherein the second identification information is identical to the first identification information;
means for encrypting the second identification with the content data by a content key;
means for encrypting the content key by the individual key;
means for sending the encrypted first identification information with the individual key, the encrypted second identification information with the content data, and the encrypted content key to the information receiving apparatus; and
wherein the information receiving apparatus comprises;
means for holding the distribution key;
means for receiving the encrypted first identification information with the individual key, the encrypted second identification information with the content data, and the encrypted content key to the information receiving apparatus;
means for decrypting the encrypted first identification information with the individual key using the distribution key to acquire the first identification information and the individual key;
means for decrypting the encrypted content key using the individual key to acquire the content key;
means for decrypting the encrypted second identification information with the content data by using the content key to acquire the second identification information and the content data; and
means for comparing the first identification information with the second identification information.
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Accused Products
Abstract
An information receiving apparatus receives identification information and encrypted identification information and makes a comparison between them to allow prevention of illegal utilization of contents data. Also, a data storage apparatus can record contents data encrypted by a content key and the content key so that the contents data can be reproduced on other apparatuses to improve versatility. Moreover, a management apparatus can manage the contents data in the data storage apparatus to allow other apparatuses to utilize it. And also, an information regulating apparatus can verify a signature on available data to prevent illegal utilization of the contents data. Furthermore, the data storage apparatus can store the content key, its handling policies, the contents data encrypted by the content key and its license conditions information so as to safely provide the contents data. In addition, an information recording apparatus can select favorite contents data and store it on the data storage apparatus. Furthermore, the information receiving apparatus can prevent utilization of provision-prohibited contents data by a provision prohibition list.
211 Citations
36 Claims
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1. A multimedia content delivery system for sending predetermined content data from an information sending apparatus to an information receiving apparatus, wherein the information sending apparatus comprises:
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means for holding first identification information with an individual key, wherein the first identification information identifies the information sending apparatus and the individual key is unique to the information sending apparatus, and further wherein the first identification information with the individual key is encrypted by a distribution key that is unique to the information receiving apparatus; means for adding second identification information to the content data, wherein the second identification information is identical to the first identification information; means for encrypting the second identification with the content data by a content key; means for encrypting the content key by the individual key; means for sending the encrypted first identification information with the individual key, the encrypted second identification information with the content data, and the encrypted content key to the information receiving apparatus; and wherein the information receiving apparatus comprises; means for holding the distribution key; means for receiving the encrypted first identification information with the individual key, the encrypted second identification information with the content data, and the encrypted content key to the information receiving apparatus; means for decrypting the encrypted first identification information with the individual key using the distribution key to acquire the first identification information and the individual key; means for decrypting the encrypted content key using the individual key to acquire the content key; means for decrypting the encrypted second identification information with the content data by using the content key to acquire the second identification information and the content data; and means for comparing the first identification information with the second identification information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A multimedia content delivery method for sending predetermined content data from an information sending apparatus to an information receiving apparatus, the method comprising:
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holding first identification information with an individual key, wherein the first identification information identifies the information sending apparatus and the individual key is unique to the information sending apparatus, and further wherein the first identification information with the individual key is encrypted by a distribution key that is unique to the information receiving apparatus; adding second identification information to the content data, wherein the second identification information is identical to the first identification information encrypting the second identification with the content data by a content key; encrypting the content key by the individual key; sending the encrypted first identification information with the individual key, the encrypted second identification information with the content data, and the encrypted content key to the information receiving apparatus, where the information is stored in memory. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A multimedia content receiving method for receiving predetermined content data at an information receiving apparatus from an information sending apparatus, the method comprising:
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holding a distribution key that is unique to the information receiving apparatus; and receiving, from the information sending apparatus, encrypted first identification information with an individual key, encrypted second identification information with content data, and an encrypted content key; decrypting the encrypted first identification information with the individual key using the distribution key to acquire the first identification information and the individual key; decrypting the encrypted content key using the individual key to acquire the content key; decrypting the encrypted second identification information with the content data by using the content key to acquire the second identification information and the content data; and comparing the first identification information to the second identification information, and storing the result in memory. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification