Downloadable computer software for authenticating users, service accounts, applications, software agents, and devices; validating digital credentials and computer security attestations; managing access permissions and delegated access rights; checking policy versions, validity periods, and revocation status; detecting replayed authorization evidence; evaluating authorization requests; and enforcing access control and authorization policies for applications, workflows, software agents, and artificial intelligence agents; Downloadable computer software for controlling, before execution, whether requests may be processed by artificial intelligence systems and whether actions may access networks, computer systems, or data, transmit data, invoke application programming interfaces, change records or settings, initiate transactions, release credentials, or control devices; and generating, validating, logging, and auditing cryptographically verifiable authorization evidence and records for reconstructing authorization decisions