A compute server receives, at a first compute server of a plurality of compute servers, a request from a client device, where the plurality of compute servers are part of a distributed cloud computing platform, and wherein the request is a request for a network resource. The compute server executes, by a single process at the first compute server, a nonce generator, wherein the nonce generator is run in a one of a plurality of isolated execution environments, locates at least one content item in response to the request for the network resource, detects a first nonce value in the at least one content item, computes a second nonce value by the nonce generator, and replaces the first nonce value with the second nonce value in the content item.