Resumen de Real-time pay-per-view of protected multimedia content
This thesis covers different aspects of e-commerce, More precisely, it deals with both unicast and multicast pay-per-view distribution of protected multimedia streams.
From the customer's point of view, content should be paid as it is being accessed. From the merchant's point of view, the intellectual property of his content must be protected and/or illegal redistributors must be traceable. Finally, the merchant must be able to use web statistics to improve his revenue and/or customer-merchant relationship. Moreover, the customer must be sure that her privacy is protected when web statistics are data mined by third parties. After an overview of the technology related to e-commerce of video streams towards personal devices, this thesis has presented as results prototypes, security protocols and data processing algorithms.
Several results have been presented in this thesis:
- We have presented a design for a pay-as-you-watch service, in which content is being paid for as it is being received. A prototype has been implemented and tested over WLAN, GPRS and UMTS networks. Moreover, we have proposed a set of protocols for secure fingerprinting based on a TTP.From experimentation with that prototype, sending payment tokens through wireless networks has proven to be feasible, whereas generation of payment tokens by handheld devices has proven to be a heavy task due to the low computing power of such devices.
- We have addressed pay-as-you-watch and fingerprinting copyright protection in multicast environments. Two problems must be overcome. On one hand, payment implosion arises at the source; on the other hand it seems unnatural that a single stream that is multicast can be fingerprinted differently for each customer. We have overcome the first problem with two contributions:
a subscription-based payment scheme using our protocol for securely aggregating information from the receivers to the multicast source (this protocol can also be
