US 12,621,385 B1 · Call source verification

Abstract

Methods and systems described herein are directed to verifying a caller's identity during a phone call by exchanging sub-audible tones between two parties to a phone call. A code, password, or other message can be embedded within telephone audio signals as sub-audible tones, which can be used to facilitate a verification process. The combined audio signal that includes sub-audible tones can be analyzed by a receiving device to extract an embedded code or message. Aspects of cryptographic schemes can be implemented using sub-audible tones—such as time-based one-time passwords (TOTP) and handshakes—which verify the identity of a party to a call. Based on the outcome of the verification process, the user can be notified whether verification was successful.

Claims20

Dependent claims

A method for verifying a party to a telephone call, the method comprising:

recording an audio clip from a telephone call between a caller and a callee;
identifying one or more sub-audible tones within the audio clip, wherein the one or more sub-audible tones originate from the caller and occur at a first time;
determining a first code based on the one or more sub-audible tones and a sub-audible tone map;
generating a second code based at least in part on the first time;
determining that the first code is related to the second code;
and
in response to determining that the first code is related to the second code, notifying the callee that the caller has been verified.

4 more elements

A computing system associated with a first party for verifying a second party to a telephone call, the computing system comprising:

one or more processors;
and
one or more memories storing instructions that, when executed by the one or more processors, cause the computing system to perform operations comprising:
generating one or more first sub-audible tones based at least in part on a first code;
combining an audio signal captured by a microphone with the one or more first sub-audible tones to generate a first combined audio signal;
transmitting the first combined audio signal to a phone system associated with the second party;
receiving a second combined audio signal from the phone system associated with the second party;
identifying, from the second combined audio signal, one or more second sub-audible tones;
determining a second code based at least in part on the one or more second sub-audible tones;
determining that the first code is related to the second code;
and
in response to determining that the first code is related to the second code, generating a notification to the first party that the second party has been verified.

9 more elements

A non-transitory computer-readable storage medium storing instructions that, when executed by a computing system, cause the computing system to perform a process for verifying a party to a telephone call, the process comprising:

recording an audio clip from a telephone call between a caller and a callee;
identifying one or more sub-audible tones within the audio clip, wherein the one or more sub-audible tones originate from the caller and occur at a first time;
determining a first code based on the one or more sub-audible tones and a sub-audible tone map;
generating a second code based at least in part on the first time;
determining that the first code is related to the second code;
and
in response to determining that the first code is related to the second code, notifying the callee that the caller has been verified.

4 more elements

Dependencies are inferred from the claim text.

Call source verification

Life of this patent

Call source verification

Life of this patent

Abstract

Claims20