PRIVACY-PRESERVING MEDICAL SEARCH SYSTEM USING SIMILARITY PRESERVING HASHING

Implementations set forth herein relate to a peer-to-peer search system for patient medical records for leveraging benefits of identifying similar patient cases in a secured singular network. The peer-to-peer search system can use a distributed ledger to securely correlate similar instances of medical data, located in various other systems, to a globally accessible network that is available via the peer-to-peer search system. For instance, medical data from various sources can be hashed by a hash technique, such as locality-sensitive hashing, and stored in a hash database. When the hash database is queried via the peer-to-peer search system, hash data corresponding to query results can be provided and, optionally, ranked according to similarities between a hashing of input query to a hashing of documents embodying the query results.