Systems and methods for generating and processing secure search queries

A method being implemented by a computing system including one or more processors and a storage media storing machine-readable instructions, the method comprising:

• generating a first signature value corresponding to a search term based on a cryptographic hash function, wherein the first signature value is a cryptographic hash value and the search term corresponds to a portion of a first dataset stored in a first data region having a first access permission level;
• truncating the first signature value based on a signature anonymization value, wherein the signature anonymization value indicates a number of character placements at which to truncate the first signature value and corresponds to at least a predetermined number of matches if a second dataset includes at least a threshold number of entries;
• generating, based on the truncated first signature value, a secure search query for the search term with which to search the second dataset stored in a second data region having a second access permission level;
• receiving a response to the secure search query, wherein the response includes a plurality of second signature values based on the cryptographic hash function and each of the plurality of second signature values corresponding to an entry of the second dataset that is associated with the search term;
• disambiguating the plurality of the second signature values based on the cryptographic technique to reveal entries of the second dataset that are associated with the search term;
• and
• generating a notification in response to each of the entries of the second dataset matching the portion of the first dataset.

A non-transitory computer readable medium of a computing system storing instructions that, when executed by one or more processors, cause the computing system to perform:

• generating a first signature value corresponding to a search term based on a cryptographic hash function, wherein the first signature value is a cryptographic hash value and the search term corresponds to a portion of a first dataset stored in a first data region having a first access permission level;
• truncating the first signature value based on a signature anonymization value, wherein the signature anonymization value indicates a number of character placements at which to truncate the first signature value and corresponds to at least a predetermined number of matches if a second dataset includes at least a threshold number of entries;
• generating, based on the truncated first signature value, a secure search query for the search term with which to search the second dataset stored in a second data region having a second access permission level;
• receiving a response to the secure search query, wherein the response includes a plurality of second signature values based on the cryptographic hash function and each of the plurality of second signature values corresponding to an entry of the second dataset that is associated with the search term;
• disambiguating the plurality of the second signature values based on the cryptographic technique to reveal entries of the second dataset that are associated with the search term;
• and
• generating a notification in response to each of the entries of the second dataset matching the portion of the first dataset.