A MODEL FOR INTEGRATED INTEGRITY VERIFICATION AND PERSONAL DATA RECOVERY IN CROSS-CHAIN BRIDGES BASED ON UMAC AND CODE-BASED CRYPTOGRAFIC CONSTRUCTIONS

Abstract

An integrated model for integrity verification and personal data recovery during transmission across cross-chain bridges is proposed. The model combines UMAC-32, the internal UHASH-32 universal hashing mechanism, the McEliece cryptographic code construction, and a Niederreiter syndrome-based component into a unified marker linked to a nonce, timestamp, and routing context. UMAC provides rapid integrity and authenticity verification, while the code-based components distinguish intentional modification from accidental correctable corruption. Recovery is permitted only within the code’s error-correcting capability and is completed by recomputing UMAC. Experimental simulation in SimPy involving 120,000 cross-chain transmissions showed that the integrated approach reduced cryptographic processing time by 64.28% and overall latency by 6.34% compared with the permanent full-protection mode, while maintaining a 98.53% recovery rate for correctable corrupted messages. The model is intended to provide application-layer protection for personal data on top of the underlying bridge protocol and requires further validation using real-world software implementations and operational logs.