Payment and usage information is passed back to
Payment and usage information is passed back to the clearinghouse. An electronic purse can store a small cache of credit within the media player. This avoids the need to clear every transaction. DRM systems should have means to silently report tampering back to the data center. Super-distribution Super-distribution commonly is used in viral marketing. This is where customers pass content to friends, perhaps in the belief that it is a shared secret. Content that is passed from user to user has to have persistent protection after copying. Each user must make an individual transaction to gain authorization to use the content. Issues for the user So far I have considered the providers issues. The choice of DRM is also an issue for the consumer. If the system is too complex, there are thousands of other web sites out there, only a click away. Another major issue is payment security. Customers have to trust the supplier with their credit card details. The consequence of this fear is that reputable traders can lose potential business. There are steps being taken to counteract these fears, where trusted third parties act as brokers for online transactions. A good DRM system should be transparent to the end-users. The acquisition of the software executables should be automatic and not require manual intervention from the user. Browsers now include rights management preinstalled. The second is that the financial transactions must be simple and secure. Most DRM systems allocate the license to a node and not the user. Some attributes of the PC are used as part of the key; for example, the file may be locked to an IP address. If you want to move protected media between a desktop PC and a laptop this may require a nodeless DRM. Note that this is not copying; the content is moved to the portable machine and then moved back to the desktop. Clearing houses Subscriptions could be managed by a web site database. All that is required is secure authorization and usage statistics. If the consumer pays for content the clearinghouses will process the micro-payments from consumers and pass payments to the content providers. An electronic purse may hold a small local cache of credit. Rights management 273
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