1. A computer-implemented method, comprising: identifying resource requests with a distributed security system external to addressed receiving devices and external to addressed transmitting devices of the resource requests implemented as an overlay network; for each of the identified resource requests: determining the resource request includes one of a plurality of predetermined encoded prefix data, each of the predetermined encoded prefix data being indicative of prefix data of an embedded resource request identifier associated with an address of an anonymous proxy server; when the resource request is determined to include one of the plurality of predetermined encoded prefix data, decoding the encoded prefix data and encoded subsequent data that is contiguous with the encoded prefix data and encoded according to an encoding scheme of the encoded prefix data; determining the decoded prefix data and subsequent data comprises an embedded resource request identifier; and when the decoded prefix data and subsequent data comprises an embedded resource request identifier, generating a security notification to instantiate a security process responsive to the embedded resource request identifier.