<p>The fast progression of quantum computing (QC) presents a considerable risk to traditional cryptography techniques, such as the Elliptic Curve Digital Signature Algorithm (ECDSA) and RSA, both of which are susceptible to quantum assaults. The threat pertains to Distributed Ledger Technologies (DLTs), including blockchain, which depend on certain cryptographic principles for security and integrity. We present Future-Secure Digital Signatures (FSDS), an innovative quantum-resistant digital authentication architecture designed for next-generation ledger systems, to address this difficulty. FSDS improves current hash-based digital signatures (HBS) using lattice-based cryptography and multi-party computing (MPC), providing enhanced post-quantum security assurances. In contrast to traditional HBS schemes like the Extended Merkle Signature Scheme (XMSS), FSDS use zero-knowledge proofs (ZKPs) to enhance the efficiency of public key and signature dimensions while maintaining security integrity. Our experimental findings indicate that FSDS diminishes key size by 70% and enhances signature generation time by 65% in comparison to state-of-the-art post-quantum systems like Dilithium and SPHINCS+. Furthermore, the FSDS-One-Time Signature (FSDS-OTS) methodology utilizes homomorphic encryption (HE) to augment signature efficiency, diminishing signature size by 75% compared to conventional approaches such as Winternitz One-Time Signature (WOTS) and WOTS+. Moreover, FSDS is engineered to interact effortlessly with quantum-resistant blockchain frameworks utilizing High-Level Petri Nets (HLPNs), guaranteeing resilience, efficiency, and scalability for secure decentralized systems. These developments establish FSDS as a very versatile and effective post-quantum digital signature architecture for future-proof ledger technologies.</p>