Systems and methods for cluster-based voice verification

A system for user authentication, the system comprising:

• a recorder configured to record audio data of speech spoken by a user;
• an authentication server comprising a processor and a non-transitory memory, the memory storing instructions that, when executed by the processor, cause the processor to perform processing comprising:
• receiving audio data including speech of a plurality of users;
• using audio data for at least a subset of the plurality of users to store a plurality of known characteristics, each known characteristic being associated with at least one cluster, the storing comprising:
• for each of the subsets of the plurality of users, determining identifying data for each user, and analyzing the audio data to identify at least one characteristic of the speech of the user, and
• storing the at least one characteristic of the speech of each user included in the plurality of users based on the identifying data for the user as the known characteristic;
• and
• using audio data for at least one of the plurality of users to identify the user, the identifying comprising:
• analyzing the audio data to identify at least one characteristic of the speech of the user,
• associating the at least one characteristic to a cluster based on a comparison with a plurality of known characteristics, each known characteristic being associated with at least one cluster,
• receiving data indicative of a purported demographic of the user, and
• identifying the user as:
• likely belonging to the purported demographic in response to determining the data indicative of the purported demographic matches the data indicative of the at least one of the plurality of users, or
• unlikely to belong to the purported demographic in response to determining the data indicative of the purported demographic matches data indicative of a different at least one of the plurality of users.

A non-transitory computer readable medium storing instructions that, when executed by a processor, cause the processor to perform processing comprising:

• receiving audio data including speech of a user;
• analyzing the audio data to identify at least one characteristic of the speech of the user;
• associating the at least one characteristic to a cluster based on a comparison with a plurality of known characteristics, each known characteristic being associated with at least one cluster;
• receiving data indicative of a purported demographic of the user;
• comparing the data indicative of the purported demographic to data indicative of the at least one cluster;
• and
• identifying the user as at least one of:
• likely belonging to the purported demographic in response to determining the data indicative of the purported demographic matches the data indicative of the at least one cluster, and
• unlikely to belong to the purported demographic in response to determining the data indicative of the purported demographic matches data indicative of a different cluster.