A secure payment system provisions a payment transaction proxy with virtual EMV-type chipcards on secure backend servers. Users authorize the proxy in each transaction to make payments in the Cloud for them. The proxy carries out the job without exposing the cryptographic keys to risk. User, message, and/or device authentication in multifactor configurations are erected in realtime to validate each user's intent to permit the proxy to sign for a particular transaction on the user's behalf. Users are led through a series of steps by the proxy to validate their authenticity and intent, sometimes incrementally involving additional user devices and communications channels that were pre-registered. Authentication risk can be scored by the proxy, and high risk transactions that are identified are tasked by further incrementally linking in more user devices, communications channels, and user challenges to increase the number of security factors required to authenticate.
展开▼
