Terminal Access Key Management for Secure Bank Intranet Links

The system performs preliminary security actions by generating device fingerprints before access, creating cryptographic keys in advance, and establishing trusted device profiles. The server generates a first key based on registration time, identification information, and fingerprint information before the actual access occurs, preparing security credentials beforehand to enable both accessibility and security.

The patent introduces cryptographic keys and device fingerprints as intermediary elements between the mobile terminal and the bank's intranet. These intermediaries act as mediators that enable secure communication without direct exposure, with the first key serving as a secret intermediary that establishes trusted connections while preventing unauthorized access.

The patent applies local quality by implementing security measures at specific critical points rather than uniformly across the entire system. Device fingerprints are generated locally on the terminal device, the first key is created based on local registration information, and encryption/decryption operations occur at specific interfaces. This localized approach provides comprehensive security while avoiding the complexity of uniform security implementation throughout the entire access link.

The system changes parameters by transforming device identification information into cryptographic keys through hash algorithms. The first key is generated by changing parameters based on registration time, identification information, and fingerprint information. This parameter transformation approach provides robust security through cryptographic operations without requiring complex security infrastructure, as the security strength derives from parameter transformation rather than system complexity.