Encrypted PII Matching Platform Against Dictionary Attacks

The patent introduces a buffer server as an intermediary component between communication parties. This buffer server stores ciphertext and manages the encryption/decryption process, isolating the key management from the communication flow. The buffer server acts as a mediator that handles key distribution and ciphertext management, reducing the attack surface for dictionary attacks while maintaining data confidentiality.

The patent segments the cryptographic communication system into distinct functional components: encryption modules, decryption modules, and a buffer server. Each component has a specific responsibility, with the buffer server handling key management and ciphertext storage separately from the actual communication. This segmentation allows for more targeted security measures and reduces the impact of potential key management errors.

The patent extracts and removes personally identifiable information (PII) from the communication process. Instead of transmitting actual PII between parties, the system uses a buffer server that stores and manages ciphertext representations. The buffer server enables transaction capability by matching ciphertexts without exposing underlying PII, thus extracting the essential functionality while removing the privacy risk.

The patent creates and uses ciphertext copies of PII instead of transmitting the actual PII. The buffer server stores and operates on these ciphertext representations, which are functional copies that enable transaction matching and verification without revealing the original personal information. This copying approach maintains transaction capability while protecting privacy.