Participants are PS3s registered via Playstation Network accounts. If extra security is required, credit card information can be also requested to join in this initiative.
Then, via network, a security hardware leased from SCE can access the user database that contains PSN user IDs and associated hardware IDs of Cell processors.
However, the ISP's grid task server remains a weak link. If it is not similarly secure, it is still the system that determines which PS3 units will be picked and will be listening for the authentication traffic.
True ! But there is no reason to think why anyone would _not_ secure the task server(s). There are accounting implications (Who gets paid for the job done).
On the other side of the fence, someone can hack into a supercomputer too.
Perhaps the ISP wants to make some money off of corporate espionage?
There are thousands of ISPs and there are bound to be some that have poor security policies, or large ISPs where one server was set up when the tech was in a hurry.
Look at how lousy most large corporation security policies are right now.
Some kind of initiative outside of the security SDK must be present to verify and build trust.
The client can't do that.
Grid computing takes that decision away from the client and abstracts it behind the service provider's interface.
It's something less pervasive if there isn't that utility aspect.
Not all "Grids" are this way ?
In the "PS3 business network" case, the network consists of PS3 nodes and probably a set of task servers that are controlled by the paying customers (or Sony). They can be secured. Unauthorized nodes won't be able to join the network.
An enormous demand for computing will be born in homes. A part of the Cell's computation power could be sold to, for example, information service providers and could be purchased when large processing power was necessary. This is already realized as a part of grid computing, but the Cell could realize it in much faster and more effective way. This would encourage the emergence of a new business.