MUMBAI, India, Oct. 26 -- Intellectual Property India has published a patent application (202641123192 A) filed by Topgrep Tech Private Limited on October 14, 2026, for System And Method For Post-Quantum Credential Exchange Through Opaque Edge Tokens.
Inventors include Dr Reine De Reanzi Sebastianappan; and Ajithkumar Ns.
The application for the patent was published on October 23, 2026, under issue no. 43/2026.
Abstract: ABSTRACT System and Method for Post-Quantum Credential Exchange Through Opaque Edge Tokens The invention discloses a system and method for postquantum credential exchange through opaque edge tokens, wherein large latticebased digital signatures are confined within a trust perimeter and compact entropybased tokens are deployed at the client boundary. A browser stores an HttpOnly cookie carrying a cryptographically secure random value, hashed serverside, thereby forming an opaque token devoid of signature, key material, or claims. An API gateway resolves the opaque token into a hybrid signed JSON Web Token comprising Ed25519 and MLDSA65 signatures, confined to the internal service mesh. Downstream services perform independent verification without modification. Revocation is achieved by deletion of the session row, ensuring immediate enforcement. Trustprofile separation of cookies provides distinct blast radii for portal and federation routes. Channel protection is ensured by hybrid MLKEM key exchange within TLS. The architecture eliminates bearertoken attack surfaces and enables quantumsafe credential exchange through unmodified infrastructure.
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