Abstract: Examples of the present disclosure provide an authenticator system that protects secret authentication keys associated with relying parties to which a user is authenticating. Present systems and methods allow cross-platform and cross-device WebAuthn usage. Example systems employ a server-based secure enclave and secure tunnel communication between the browser application or mobile application and the secure enclave server. A user of a service provider of the authenticator system owns the secret authentication key, which is stored in an encrypted vault protected by a user secret and hosted by the service provider. Decrypting the secret key may be based on a key arrangement, where keys from the user, the service provider, and the secure enclave are used to successfully decrypt the secret authentication key within the secure enclave.

Abstract: A system and method for protecting user data using a key escrow service. The key escrow service may be hosted by a service provider to integrate Identity Access Management (IAM) solutions, such as Single-Sign-On (SSO) and/or System for Cross-domain Identity Management (SCIM), with a zero-knowledge service, such as a password manager or other service handling sensitive user data. In examples, secure enclave technology may be used to allow the service provider to host and manage the key escrow service without being able to access any cryptographic key used and/or stored within a secure enclave. Accordingly, in some aspects, the service provider may have the ability to store users' secret keys for SSO and sharing keys for SCIM in a trusted, secure storage location without breaking the zero-knowledge principles of the infrastructure.