Software-as-a-Service (SaaS) and Platform-as-a-Service (PaaS) featuring non-downloadable software for lifecycle-separated custody-state representation, asset-environment representation, release-state representation, cryptographic key lifecycle management, identity-linked access control management, escrow-state support, digital-asset lifecycle visibility, asset-environment coordination, authentication support, compliance-support workflow management, audit-oriented traceability, and interoperab...