Abstract: A proxy that requests, and then analyzes, some test characteristics of a client to generate a client signature profile. When the test characteristics change in a manner to suggest that the client has been spoofed or infected, the proxy could trigger appropriate security measures to adjust communication protocols with the client. The test characteristics could also be randomly selected, and if the wrong test characteristics are sent to the server by the client in response to a request for test characteristics, another security alert could be triggered.

Abstract: A proxy dynamically encrypts data that is transmitted between a server and a client. The proxy randomly selects an encryption algorithm for the client to use during various time periods (e.g. every transaction, every 10 minutes, or during randomly chosen time periods). If the client transmits a response without using the selected encryption algorithm, the system could trigger an alert specific to the client, ranging from a detailed analysis of the client to blocking traffic from the client outright.

Abstract: A proxy that encapsulates computer code transmitted between a client and a server is disclosed. The proxy encapsulates one portion of the computer code within another portion of computer code, such as encapsulating Javascript within HTML or encapsulating Javascript within VBScript within HTML. The proxy could selects portions of the computer code to encapsulate in accordance with a selective algorithm or a randomizer, and could randomize function names that are executed to produce the encapsulated code. If the proxy detects a response from a client that is malformed, the proxy could trigger appropriate security measures to adjust communication protocols with the client.