SYSTEM AND METHOD ENABLING NETWORKED SYSTEMS TO SAFELY USE DIGITAL CONTENT E.G. CODE

Method for distributing content to endpoint computers by sending signed content from a content-providing server to customer special-user workstations each including an enclave networked to its own subpopulation of endpoint computers which is a subset of the endpoint computers' population; and/or, in each enclave, authenticating that content received was signed by the server and then generating non-identical copies of the content received to be used by endpoint computers belonging to the individual enclave's subpopulation, signing the non-identical copies and sending the non-identical signed copies to endpoint computer/s in the enclave's subpopulation of endpoint computers, and/or in at least one enclave, authenticating that content received was signed by the given special-user workstation and then using the content received that was signed by the given special-user workstation, on or in the endpoint computer/s. Entity/ies may re-sign signed content verified by the individual entity using a combination of keys pre-provisioned in entities.