Method and system for implementing telephone solicitation prevention

• US 10,778,841 B2
• Filed: 05/29/2019
• Issued: 09/15/2020
• Est. Priority Date: 11/13/2018
• Status: Active Grant

• Current Assignee: CenturyLink Intellectual Property LLC (Lumen Technologies, Inc.)
• Original Assignee: CenturyLink Intellectual Property LLC (Lumen Technologies, Inc.)
• Inventors: Scivicque, Joseph A.
• Primary Examiner(s): Cattungal, Ajay
• Application Number:
  US16/425,690
• Publication Number:
  US 20200153877A1
• Time in Patent Office: 475 Days
• CPC Class Codes: H04L 2101/65 Telephone numbers
• CPC Class Codes: H04L 61/4535 using an address exchange platform which sets up a session between two nodes, e.g. rendezvous servers, session initiation protocols [SIP] registrars or H.323 gatekeepers
• CPC Class Codes: H04L 65/1046 Call controllers; Call servers
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1079 of unsolicited session attempts, e.g. SPIT
• CPC Class Codes: H04L 65/1096 Supplementary features, e.g. call forwarding or call holding systems providing special services or facilities to telephony subscribers H04M3/42
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 9/30 Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
• CPC Class Codes: H04L 9/3247 involving digital signatures
• CPC Class Codes: H04L 9/3268 using certificate validation, registration, distribution or revocation, e.g. certificate revocation list [CRL]
• CPC Class Codes: H04M 2203/6072 Authentication using challenger response
• CPC Class Codes: H04M 3/42059 Making use of the calling party identifier
• CPC Class Codes: H04M 3/436 Arrangements for screening incoming calls , i.e. evaluating the characteristics of a call before deciding whether to answer it based on the calling party profile H04M3/42059; based on location H04M3/42348; based on presence H04M3/42365; diversion H04M3/54
• CPC Class Codes: H04M 3/4365 based on information specified by the calling party, e.g. priority or subject

Abstract

Novel tools and techniques are provided for implementing telephone solicitation prevention using enhanced voice over Internet protocol (“VoIP”) functionalities in conjunction with STIR/SHAKEN protocols. In various embodiments, in response to receiving a call setup message or a call request from a calling party, a call server might send a verification request to a secure telephone identity (“STI”) verification server (“VS”). The STI-VS might verify and send the call setup message to a no solicitation application server, which might instruct a media server to connect to a first gateway device and to play a no solicitation message requesting a response from the calling party, and which might verify whether the response is an appropriate response. If so, a call is established. If not, the call might be disconnected and/or forwarded to a voicemail server to play a voicemail message to the calling party in accordance with preferences of the called party.

Claims

1. A method, comprising:

receiving, with a first gateway device and from a calling party, a request to connect a call with a called party, the request including a called number associated with the called party;

sending, with the first gateway device, a call setup request to a first call server in a first network;

in response to receiving the call setup request, sending, with the first call server, a signing request to a secure telephone identity (“

STI”

) authentication server (“

AS”

);

in response to receiving the signing request, querying, with the STI-AS, a secure key server (“

SKS”

) for a private key;

setting, with the STI-AS, an attestation level for the calling party based on one or more attributes associated with the calling party;

creating, with the STI-AS, a signed call setup message using the private key;

returning, with the STI-AS, the signed call setup message to the first call server;

in response to receiving the signed call setup message, selecting, with the first call server, a route through a plurality of call servers to a second call server in a second network, using the called number;

sending, with the first call server, the signed call setup message to the second call server via the selected route;

in response to receiving the signed call setup message, sending, with the second call server, a verification request to a STI verification server (“

VS”

);

in response to receiving the verification request, querying, with the STI-VS, a certificate repository for a public key, based on information in the verification request;

decrypting and verifying, with the STI-VS, the signed call setup message using the public key;

sending, with the STI-VS, the decrypted call setup message to a no solicitation application server;

instructing, with the no solicitation application server, a media server to connect to the first gateway device and to play a no solicitation message requesting a response from the calling party;

returning, with the media server, a reply message to the no solicitation application server indicating a connection point for a voice media path to the calling party;

propagating, with the no solicitation application server, the response back through the first and second call servers to the calling party;

enabling a path, with the first gateway device, between the calling party and the media server;

playing, with the media server, a prompt to the calling party, the prompt instructing the calling party to perform at least one of entering a first series of numbers or speaking a first series of words;

receiving, with the media server, a response from the calling party, the received response comprising at least one of a second series of entered numbers or a second series of spoken words;

returning, with the media server, the response to the no solicitation application server;

comparing, with the no solicitation application server, the second series of entered numbers with the first series of numbers or the second series of spoken words with the first series of words;

based on a determination that either the second series of entered numbers matches the first series of numbers or the second series of spoken words matches the first series of words, performing the following;

directing, with the no solicitation application server, the STI-VS to connect the call;

sending, with the STI-VS, a validated response to the second call server, along with an attestation level associated with the called party;

sending, with the second call server, a call setup message to a second gateway device;

sending, with the second gateway device, a setup message to the called party;

propagating, with the second gateway device, a backward message via the first and second call servers and via the first gateway device, the backward message containing information regarding a media path to be set up; and

establishing a connected call between the calling party and the called party, while clearing a media path between the first gateway device and the media server;

based on a determination that either the second series of entered numbers fails to match the first series of numbers or the second series of spoken words fails to match the first series of words, performing one of;

disconnecting the call;

or

forwarding the call to a voicemail server to play a voicemail message to the calling party in accordance with preferences of the called party, prior to disconnecting the call.

2. A method, comprising:

receiving, with a first gateway device and from a calling party, a request to connect a call with a called party, the request including a called number associated with the called party;

sending, with the first gateway device, a call setup request to a first call server in a first network;

in response to receiving the call setup request, sending, with the first call server, a call setup message to a second call server in a second network;

in response to receiving the call setup message, sending, with the second call server, a verification request to a secure telephone identity (“

STI”

) verification server (“

VS”

);

in response to receiving the verification request, verifying, with the STI-VS, the call setup message;

sending, with the STI-VS, the verified call setup message to a no solicitation application server;

in response to receiving the verified call setup, instructing, with the no solicitation application server, a media server to connect to the first gateway device and to play a no solicitation message requesting a response from the calling party;

returning, with the media server, a reply message to the no solicitation application server indicating a connection point for a voice media path to the calling party;

playing, with the media server, a prompt to the calling party, the prompt instructing the calling party to respond by performing one or more tasks;

receiving, with the media server, a response from the calling party in accordance with at least one of the one or more tasks;

returning, with the media server, the response to the no solicitation application server;

verifying, with the no solicitation application server, whether the response is an appropriate response in accordance with at least one of the one or more tasks;

based on a determination that the response has been verified to be an appropriate response, establishing a connected call between the calling party and the called party; and

based on a determination that the response is not an appropriate response, performing one of;

disconnecting the call;

or

forwarding the call to a voicemail server to play a voicemail message to the calling party in accordance with preferences of the called party, prior to disconnecting the call.

3. The method of claim 2, further comprising:

in response to receiving the call setup request, sending, with the first call server, a signing request to a STI authentication server (“

AS”

);

in response to receiving the signing request, querying, with the STI-AS, a secure key server (“

SKS”

) for a private key;

setting, with the STI-AS, an attestation level for the calling party based on one or more attributes associated with the calling party;

creating, with the STI-AS, a signed call setup message using the private key;

returning, with the STI-AS, the signed call setup message to the first call server; and

in response to receiving the signed call setup message, selecting, with the first call server, a route through a plurality of call servers to a second call server in a second network, using the called number;

wherein sending the call setup message to the second call server comprises sending, with the first call server, the call setup message to the second call server via the selected route.

4. The method of claim 3, further comprising:

in response to receiving the verification request, querying, with the STI-VS, a certificate repository for a public key, based on information in the verification request;

wherein verifying the call setup message comprises decrypting and verifying, with the STI-VS, the signed call setup message using the public key.

5. The method of claim 3, wherein the attestation level for the calling party comprises one of full attestation level, partial attestation level, or gateway attestation level, wherein the full attestation level requires that a signing service provider is responsible for origination of a call, that the signing service provider has a direct authenticated relationship with the calling party and can identify the calling party, and that the signing service provider has established a verified association with an originating telephone number used by the calling party to request to connect the call with the called party, wherein the partial attestation level requires that the signing service provider is responsible for origination of a call, that the signing service provider has a direct authenticated relationship with the calling party and can identify the calling party, and that the signing service provider has not established a verified association with an originating telephone number used by the calling party to request to connect the call with the called party, wherein the gateway attestation level requires that the signing service provider has control over an entry point of a call into a network and that the signing service provider has no relationship with the originator of a call.

6. The method of claim 3, further comprising:

applying, with the no solicitation application server, one of various treatment options in response to receiving the verified call setup message, wherein the various treatment options comprises at least one of;

connecting the call to the called party without any treatment for a calling party that has been whitelisted;

connecting the call to the called party in response to a calling party below a first specified attestation level entering a random string of DTMF digits;

playing a no solicitation announcement to a calling party below a second specified attestation level and disconnecting the call;

or

disconnecting the call without any announcement for a calling party below a third specified attestation level.

7. The method of claim 3, wherein the first network and the second network are the same network.

8. The method of claim 2, further comprising:

in response to receiving the reply message from the media server, propagating, with the no solicitation application server, the response back through the first and second call servers to the calling party; and

enabling a path, with the first gateway device, between the calling party and the media server, prior to playing the prompt to the calling party.

9. The method of claim 2, wherein performing the one or more tasks comprises at least one of entering a first series of numbers or speaking a first series of words, wherein the received response comprises at least one of a second series of entered numbers or a second series of spoken words, wherein verifying the response comprises comparing, with the no solicitation application server, the second series of entered numbers with the first series of numbers or the second series of spoken words with the first series of words.

10. The method of claim 8, wherein the first series of numbers comprises a random string of dual tone multi frequency (“

DTMF”

) digits.

11. The method of claim 2, wherein establishing the connected call between the calling party and the called party comprises:

directing, with the no solicitation application server, the STI-VS to connect the call;

sending, with the STI-VS, a validated response to the second call server, along with an attestation level associated with the called party;

sending, with the second call server, a call setup message to a second gateway device;

sending, with a second gateway device, a setup message to the called party;

propagating, with the second gateway device, a backward message via the first and second call servers and via the first gateway device, the backward message containing information regarding a media path to be set up; and

establishing the connected call between the calling party and the called party, while clearing a media path between the first gateway device and the media server.

12. The method of claim 2, wherein at least one of the first gateway device, the first call server, the second call server, the STI-VS, or the no solicitation application server is disposed within a voice over Internet protocol (“

VoIP”

).

13. The method of claim 2, wherein the called party is provided with options to set a preferred level of treatment for the no solicitation application server to implement in response to receiving the verified call setup message, wherein the options comprise at least one of allowing all calls to connect regardless of attestation level of the calling party, blocking all calls regardless of attestation level of the calling party, connecting all calls at the highest attestation level and applying preestablished treatment options for calls below the highest attestation level, or applying preestablished treatment options for calls below a selected attestation level below the highest attestation level and connecting other calls.

14. A system, comprising:

a first gateway device, the first gateway device comprising;

at least one first processor; and

a first non-transitory computer readable medium communicatively coupled to the at least one first processor, the first non-transitory computer readable medium having stored thereon computer software comprising a first set of instructions that, when executed by the at least one first processor, causes the first gateway device to;

receive, from a calling party, a request to connect a call with a called party, the request including a called number associated with the called party; and

send a call setup request to a first call server in a first network;

the first call server, the first call server comprising;

at least one second processor; and

a second non-transitory computer readable medium communicatively coupled to the at least one second processor, the second non-transitory computer readable medium having stored thereon computer software comprising a second set of instructions that, when executed by the at least one second processor, causes the first call server to;

receive the call setup request; and

in response to receiving the call setup request, send a call setup message to a second call server in a second network;

the second call server, the second call server comprising;

at least one third processor; and

a third non-transitory computer readable medium communicatively coupled to the at least one third processor, the third non-transitory computer readable medium having stored thereon computer software comprising a third set of instructions that, when executed by the at least one third processor, causes the second call server to;

receive the call setup message; and

in response to receiving the call setup message, send a verification request to a secure telephone identity (“

STI”

) verification server (“

VS”

);

the STI-VS, the STI-VS comprising;

at least one fourth processor; and

a fourth non-transitory computer readable medium communicatively coupled to the at least one fourth processor, the fourth non-transitory computer readable medium having stored thereon computer software comprising a fourth set of instructions that, when executed by the at least one fourth processor, causes the STI-VS to;

receive the verification request;

in response to receiving the verification request, verify the call setup message; and

send the verified call setup message to a no solicitation application server;

the no solicitation application server, the no solicitation application server comprising;

at least one fifth processor; and

a fifth non-transitory computer readable medium communicatively coupled to the at least one fifth processor, the fifth non-transitory computer readable medium having stored thereon computer software comprising a fifth set of instructions that, when executed by the at least one fifth processor, causes the no solicitation application server to;

receive the verified call setup; and

in response to receiving the verified call setup, instruct a media server to connect to the first gateway device and to play a no solicitation message requesting a response from the calling party;

the media server, the media server comprising;

at least one sixth processor; and

a sixth non-transitory computer readable medium communicatively coupled to the at least one sixth processor, the sixth non-transitory computer readable medium having stored thereon computer software comprising a sixth set of instructions that, when executed by the at least one sixth processor, causes the media server to;

return a reply message to the no solicitation application server indicating a connection point for a voice media path to the calling party;

play a prompt to the calling party, the prompt instructing the calling party to respond by performing one or more tasks;

receive a response from the calling party in accordance with at least one of the one or more tasks; and

return the response to the no solicitation application server;

wherein the fifth set of instructions, when executed by the at least one fifth processor, further causes the no solicitation application server to;

verify whether the response is an appropriate response in accordance with at least one of the one or more tasks;

based on a determination that the response has been verified to be an appropriate response, establish a connected call between the calling party and the called party; and

based on a determination that the response is not an appropriate response, perform one of;

disconnecting the call;

or

forwarding the call to a voicemail server to play a voicemail message to the calling party in accordance with preferences of the called party, prior to disconnecting the call.

15. The system of claim 14, wherein the fifth set of instructions, when executed by the at least one fifth processor, further causes the no solicitation application server to:

apply one of various treatment options in response to receiving the verified call setup message, wherein the various treatment options comprises at least one of;

connecting the call to the called party without any treatment for a calling party that has been whitelisted;

connecting the call to the called party in response to a calling party below a first specified attestation level entering a random string of DTMF digits;

playing a no solicitation announcement to a calling party below a second specified attestation level and disconnecting the call;

or

disconnecting the call without any announcement for a calling party below a third specified attestation level.

16. The system of claim 14, wherein performing the one or more tasks comprises at least one of entering a first series of numbers or speaking a first series of words, wherein the received response comprises at least one of a second series of entered numbers or a second series of spoken words, wherein verifying the response comprises comparing, with the no solicitation application server, the second series of entered numbers with the first series of numbers or the second series of spoken words with the first series of words.

17. The system of claim 14, wherein the first series of numbers comprises a random string of dual tone multi frequency (“

DTMF”

) digits.

18. The system of claim 14, wherein establishing the connected call between the calling party and the called party comprises:

directing, with the no solicitation application server, the STI-VS to connect the call;

sending, with the STI-VS, a validated response to the second call server, along with an attestation level associated with the called party;

sending, with the second call server, a call setup message to a second gateway device;

sending, with a second gateway device, a setup message to the called party;

propagating, with the second gateway device, a backward message via the first and second call servers and via the first gateway device, the backward message containing information regarding a media path to be set up; and

establishing the connected call between the calling party and the called party, while clearing a media path between the first gateway device and the media server.

19. The system of claim 14, wherein at least one of the first gateway device, the first call server, the second call server, the STI-VS, or the no solicitation application server is disposed within a voice over Internet protocol (“

VoIP”

).

20. The system of claim 14, wherein the called party is provided with options to set a preferred level of treatment for the no solicitation application server to implement in response to receiving the verified call setup message, wherein the options comprise at least one of allowing all calls to connect regardless of attestation level of the calling party, blocking all calls regardless of attestation level of the calling party, connecting all calls at the highest attestation level and applying preestablished treatment options for calls below the highest attestation level, or applying preestablished treatment options for calls below a selected attestation level below the highest attestation level and connecting other calls.