Traceable Cross-Domain Data Sharing With Expressive Keyword Search

This research proposes TCroS, a system for securely sharing sensitive data across different manufacturer domains in Internet of Vehicles (IoV, connected vehicles that communicate over the internet) while allowing users to search for specific information using keywords. The system uses proxy re-encryption (a technique that transforms encrypted data so it can be decrypted by different authorized parties) and embeds requester identities into decryption keys so that if an encryption key is leaked, the source can be traced. The authors also created an extended version called TCroSS that adds privacy-preserving keyword search with Boolean queries (AND, OR, NOT operations) to find authorized data efficiently while protecting against keyword guessing attacks.