# US 11,310,209 B2 · Method and device for protecting confidentiality of audio messages > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,209 B2 - Document ID: US11310209B2 - Status: Granted - Kind: B2 - Application number: 16/565,521 - Filed: 2019-09-10 - Published: 2021-03-11 - Granted: 2022-04-19 - Earliest claimed: 2019-09-10 - Assignees: Motorola Solutions, Inc. - Applicants: Motorola Solutions, Inc. - Inventors: Wei Hong Tew; Eng Seng Chua; Kean Tong Choong; Chun Meng Tan; Kian Heng Loo - Web page: https://patentgrep.com/patent/US11310209B2 ## CPC - H04L 65/4061: Push-to services, e.g. push-to-talk or push-to-video - H04L 63/0428: {wherein the data content is protected, e.g. by encrypting or encapsulating the payload} - H04L 63/105: {Multiple levels of security} - H04L 65/403: Arrangements for multi-party communication, e.g. for conferences (data switching systems for conference H04L12/18; arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities H04M3/56; television conferencing systems H04N7/15) - H04L 65/765: {intermediate} - H04R 29/001: {for loudspeakers (H04R29/007 takes precedence)} - H04R 29/004: {for microphones (H04R29/007 takes precedence)} - H04W 12/63: Location-dependent; Proximity-dependent - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A process for protecting confidentiality of audio messages that are received at an electronic computing device for providing a corresponding audio output at electronic audio output devices. In operation, the electronic computing device partitions the audio message into audio content segments, where each audio content segment is assigned to a respective confidentiality level. The electronic computing device determines a current exposure level of the electronic audio output device. The electronic computing device further determines whether the audio message is to be modified based on a current exposure level of the electronic audio output device and the respective confidentiality level assigned to each audio content segment. An audio output corresponding to the modified audio message is provided at the electronic audio output device when it is determined that the audio message is to be modified. ## Claims ### Claim 1 A method of protecting confidentiality of audio messages, the method comprising: receiving, at an electronic computing device, an audio message for providing an audio output at an electronic audio output device; partitioning, at the electronic computing device, the audio message into a plurality of audio content segments, wherein each audio content segment of the plurality of audio content segments is assigned to a respective confidentiality level; determining, at the electronic computing device, a current exposure level of the electronic audio output device; determining, at the electronic computing device, whether the audio message is to be modified based on the respective confidentiality level assigned to each audio content segment of the plurality of audio content segments and the current exposure level of the electronic audio output device; and responsive to determining that the audio message is to be modified, generating, at the electronic computing device, a modified audio message by rephrasing audio content associated with at least one of the plurality of the audio content segments in the audio message based on the respective confidentiality level assigned to the at least one of the plurality of the audio content segments and the current exposure level of the electronic audio output device, and causing, at the electronic computing device, the electronic audio output device to provide an audio output corresponding to the modified audio message. ### Claim 2 (depends on 1) The method of claim 1, wherein responsive to determining that the audio message is not to be modified, the method comprising: causing the electronic audio output device to provide an audio output corresponding to an unmodified version of the audio message. ### Claim 3 (depends on 1) The method of claim 1, wherein the current exposure level is determined based on at least one of: a type of access control currently provided to an area surrounding a current location of the electronic audio output device; a current volume level of the electronic audio output device; a number of unauthorized persons being within the area surrounding the current location of the electronic audio output device; and a number of unauthorized audio recording devices within the area surrounding the current location of the electronic audio output device. ### Claim 4 (depends on 1) The method of claim 1, wherein determining the current exposure level comprises: responsive to receiving the audio message, obtaining real-time image data from one or more cameras having a field-of-view to an area surrounding a current location of the electronic audio output device; processing the real-time image data to identify one or more of (i) a number of unauthorized persons within the area surrounding the current location of the electronic audio output device, and (ii) a number of unauthorized audio recording devices within the area surrounding the current location of the electronic audio output device; and determining the current exposure level of the electronic audio output device as a function of one or more of (i) the number of unauthorized persons, and (ii) the number of unauthorized audio recording devices. ### Claim 5 (depends on 1) The method of claim 1, wherein determining the current exposure level comprises: receiving, at the electronic computing device, information related to a count of communication devices that are connected to one or more wireless access points that are deployed in an area relative to a current location of the electronic audio output device; and determining the current exposure level of the electronic audio output device as a function of the count of communication devices. ### Claim 6 (depends on 1) The method of claim 1, wherein determining whether the audio message is to be modified comprises: determining that the audio message is to be modified when the current exposure level of the electronic audio output device is greater than a predetermined exposure level threshold and further when the respective confidentiality level assigned to at least one of the audio content segments is greater than a predetermined confidentiality level threshold. ### Claim 7 (depends on 6) The method of claim 6, wherein responsive to causing the electronic audio output device to provide an audio output corresponding to the modified audio message, the method further comprising: detecting that the electronic audio output device has moved from a current location to a new location; determining an updated exposure level of the electronic audio output device at the new location; and causing the electronic audio output device to provide an audio output corresponding to an unmodified version of the audio message when the updated exposure level of the electronic audio output device at the new location is not greater than the predetermined confidentiality level threshold. ### Claim 8 (depends on 6) The method of claim 6, wherein responsive to causing the electronic audio output device to provide an audio output corresponding to the modified audio message, the method further comprising: determining an updated exposure level of the electronic audio output device based on updated information that is obtained relative to a current location of the electronic audio output device; and causing the electronic audio output device to provide an audio output corresponding to an unmodified version of the audio message when the updated exposure level of the electronic audio output device at the current location is not greater than the predetermined confidentiality level threshold. ### Claim 9 (depends on 6) The method of claim 6, further comprising: identifying a new location different from a current location of the electronic audio output device, wherein the new location corresponds to a location at which a current exposure level of the electronic audio output device would be lower than the predetermined exposure level threshold; causing an electronic notification to be provided to a user of the electronic audio output device to request the user to move to the new location; and causing the electronic audio output device to provide an audio output corresponding to an unmodified version of the audio message in response to determining that the user has arrived at the new location. ### Claim 10 (depends on 1) The method of claim 1, wherein determining whether the audio message is to be modified comprises: determining that the audio message is not to be modified when: the current exposure level of the electronic audio output device is greater than a predetermined exposure level threshold and further when the respective confidentiality level assigned to each of the plurality of audio content segments is not greater than a predetermined confidentiality level threshold; or the current exposure level of the electronic audio output device is not greater than the predetermined exposure level threshold. ### Claim 11 (depends on 1) The method of claim 1, further comprising: determining that the audio message is to be provided for audio output at at least one other electronic audio output device; determining a current exposure level of the at least one other electronic audio output device; determining whether the audio message is to be modified based on the respective confidentiality level assigned to each audio content segment of the plurality of audio content segments and the current exposure level of the at least one other electronic audio output device; and responsive to determining that the audio message is to be modified for providing an audio output at the at least one other electronic audio output device, generating a second modified audio message by rephrasing audio content associated with at least one of the plurality of the audio content segments in the audio message based on the respective confidentiality level assigned to the at least one of the plurality of the audio content segments and the current exposure level of the at least one other electronic audio output device, wherein the second modified audio message is different from the modified audio message; and causing, at the electronic computing device, the electronic audio output device to provide an audio output corresponding to the second modified audio message. ### Claim 12 (depends on 1) The method of claim 1, wherein causing comprises: transmitting, at the electronic computing device, a request to the electronic audio output device to provide an audio output corresponding to the modified audio message, the request including the modified audio message and an audio indicator that provides an indication that the modified audio message is a modified version of the audio message received from an audio message source. ### Claim 13 An electronic computing device, comprising a transceiver; and an electronic processor communicatively coupled to the transceiver, wherein the electronic processor is configured to: receive, via the transceiver, an audio message for providing an audio output at an electronic audio output device; partition the audio message into a plurality of audio content segments, wherein each audio content segment of the plurality of audio content segments is assigned to a respective confidentiality level; determine a current exposure level of the electronic audio output device; determine whether the audio message is to be modified based on the respective confidentiality level assigned to each audio content segment of the plurality of audio content segments and the current exposure level of the electronic audio output device; and when it is determined that the audio message is to be modified, generate a modified audio message by rephrasing audio content associated with at least one of the plurality of the audio content segments in the audio message based on the respective confidentiality level assigned to the at least one of the plurality of the audio content segments and the current exposure level of the electronic audio output device, and cause the electronic audio output device to provide an audio output corresponding to the modified audio message. ### Claim 14 (depends on 13) The electronic computing device of claim 13, wherein the electronic processor is configured to: cause the electronic audio output device to provide an audio output corresponding to an unmodified version of the audio message when it is determined that the audio message is not to be modified. ### Claim 15 (depends on 13) The electronic computing device of claim 13, wherein the current exposure level is determined based on at least one of: a type of access control currently provided to an area surrounding a current location of the electronic audio output device; a current volume level of the electronic audio output device; a number of unauthorized persons within the area surrounding the current location of the electronic audio output device; and a number of unauthorized audio recording devices within the area surrounding the current location of the electronic audio output device. ### Claim 16 (depends on 13) The electronic computing device of claim 13, wherein the electronic processor is configured to: responsive to receiving the audio message, obtain real-time image data from one or more cameras having a field-of-view to an area surrounding a current location of the electronic audio output device; process the real-time image data to identify one or more of (i) a number of unauthorized persons within the area surrounding the current location of the electronic audio output device, and (ii) a number of unauthorized audio recording devices within the area surrounding the current location of the electronic audio output device; and determine the current exposure level of the electronic audio output device as a function of one or more of (i) the number of unauthorized persons, and (ii) the number of unauthorized audio recording devices. ### Claim 17 (depends on 13) The electronic computing device of claim 13, wherein the electronic processor is configured to: determine that the audio message is to be modified when the current exposure level of the electronic audio output device is greater than a predetermined exposure level threshold and further when the respective confidentiality level assigned to at least one of the audio content segments is greater than a predetermined confidentiality level threshold. ### Claim 18 (depends on 17) The electronic computing device of claim 17, wherein the electronic processor is configured to: detect that the electronic audio output device has moved from a current location to a new location after providing an audio output corresponding to the modified audio message; detect an updated exposure level of the electronic audio output device at the new location; and cause the electronic audio output device to provide an audio output corresponding to an unmodified version of the audio message when the updated exposure level of the electronic audio output device at the new location is not greater than the predetermined confidentiality level threshold. ### Claim 19 (depends on 17) The electronic computing device of claim 17, wherein the electronic processor is configured to: identify a new location different from a current location of the electronic audio output device, wherein the new location corresponds to a location at which a current exposure level of the electronic audio output device would be lower than the predetermined exposure level threshold; cause an electronic notification to be provided to a user of the electronic audio output device to request the user to move to the new location; and cause the electronic audio output device to provide an audio output corresponding to an unmodified version of the audio message in response to determining that the user has arrived at the new location. ### Claim 20 (depends on 13) The electronic computing device of claim 13, wherein the electronic processor is configured to determine that the audio message is not to be modified when: the current exposure level of the electronic audio output device is greater than a predetermined exposure level threshold and further when the respective confidentiality level assigned to each of the plurality of audio content segments is not greater than a predetermined confidentiality level threshold; or the current exposure level of the electronic audio output device is not greater than the predetermined exposure level threshold.