RFC 8693: Mastering OAuth 2.0 Token Exchange for Secure Delegation and Impersonation
RFC 8693: Mastering OAuth 2.0 Token Exchange for Secure Delegation and Impersonation In the evolving landscape of modern web applications and microservices, securely managing identities across trust boundaries is paramount. RFC 8693, published in January 2020, defines the OAuth 2.0 Token Exchange protocol, providing a standardized HTTP- and JSON-based mechanism for clients to request and obtain security tokens from authorization servers acting as Security Token Services (STS).[1][3][4] This specification extends OAuth 2.0 to support critical patterns like impersonation and delegation, addressing gaps left by legacy protocols like WS-Trust.[1] ...