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paypal asp cart, and store builder information: This means that certification of the trader’ssignature can be of interest to the consumer, although even here the primary concern islikely to be that of avoiding financial loss if things go wrong. Single storefront—the client owns a single store on a single merchant server at the host. Trust and confidence in certificatesit is important to distinguish between the validity of a certificate and the validity of thesigned data it contains. Merchant sends message to the payment authorizer to make sure the payment is valid.

4: System dependabilitythe system as a whole should be available to handle transactions at all times, even when there are a large number of customers. Conceptually, the simplest way to implement the above is to use a "trusted" notary. Because there is no perfect pornography filter, this couldeffectively ban internet use in schools and prohibit a mother from giving her seventeenyear-old son unsupervised internet access from home. It should even be impossible to determine whether a particularperson has engaged in any transactions at all.