Long-Term Signature Data Verification via Segmented Hash Comparison

The patent segments the verification process into two distinct stages: a quick preliminary verification stage that checks easily computable parameters (such as expiration dates and basic data integrity), and a comprehensive detailed verification stage that performs full cryptographic validation. This segmentation allows the system to quickly filter out obviously invalid data without performing expensive computational operations on all stored signatures, thereby reducing overall verification time while maintaining reliability.

The patent applies partial verification by performing only the necessary minimum checks initially, rather than executing the complete verification protocol for every stored signature. The verification depth is adjusted based on the specific context and requirements, performing full verification only when absolutely necessary, thus reducing computation time while ensuring reliability when needed.

The patent divides the comprehensive verification process into multiple independent modular stages: hash value verification, signature verification, expiration information verification, authentication path verification, and expiration date verification. Each stage can be executed independently and in sequence, allowing the system to stop early if any stage fails, thus avoiding unnecessary computation costs while maintaining thorough authenticity confirmation when required.

The patent performs preliminary verification checks before executing the full comprehensive verification protocol. Quick checks such as verifying data format, basic integrity, and obvious expiration conditions are performed first. Only data that passes these preliminary checks proceeds to the more computationally expensive detailed verification stages, thereby reducing overall computation cost while ensuring authenticity when needed.