Escrow services and incentives in peer-to-peer networks
Proceedings of the 3rd ACM conference on Electronic Commerce
Handbook of Applied Cryptography
Handbook of Applied Cryptography
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
Short Signatures from the Weil Pairing
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Conditional Cryptographic Delegation for P2P Data Sharing
ISC '02 Proceedings of the 5th International Conference on Information Security
Separating encryption and key issuance in digital rights management systems
ACISP'03 Proceedings of the 8th Australasian conference on Information security and privacy
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The growth of the Internet has created an electronic marketplace for digital goods, such as mp3, software, etc., and peer-to-peer(P2P) networks for distribution and sharing of files have enjoyed enormous popularity in recent. However, there is an essential problem related with trustiness and reliability in P2P, where untrustworthy parties may participate in financial transactions. One general solution to this problem is distributing the encrypted version of digital content so that a legitimate user can get the decryption key from key issuing server. In this paper, we propose a new approach to key issuing for designing a secure content distribution system. Each user can recovery the original digital content from the encrypted version of it by purchasing decryption key from key issuing server. However, instead of generating a random key, the key used for content encryption and decryption can be directly derived from the usage rules or transaction terms in our system. This approach allows to separate content encrypter and key issuer, and then it also enables to remove the need of secure key transfer between content provider and key issuing server in secure content distribution system.