Call authorization and verification via a service provider code

Abstract

One example method of operation may include receiving a call message associated with a call, determining a service provider network identifier based on a telephone number of a call origination device, identifying, from the call message, an identity header with a link to a public certificate repository storing a public certificate assigned to a service provider network hosting the call origination device, retrieving a service provider code assigned to the service provider network from the public certificate, and determining whether the service provider code matches the service provider network identifier as identified from a verification table.

What is claimed is: 
     
         1 . A method comprising:
 retrieving, via a call termination service provider, a public certificate issued by the call origination provider responsive to a call being placed, to a secure telephone identity certificate repository (STI-CR) accessible by the termination service provider, wherein the public certificate identifies a storage location of a telephone number authorization list comprising corresponding service provider codes associated with a call origination device;   determining a service provider network identifier identifies a service provider network supporting the call origination device, based on a calling number of the call origination device;   retrieving, via the call termination service provider, a telephone number authorization list and the service provider codes from a public certificate assigned to the service provider network based on a link identifying a public certificate repository and a public key stored in an identity header of a call message;   determining, via the call termination service provider, whether the service provider code matches the service provider network identifier; and   blocking or verifying the call based on the match determination; wherein a verification service is processed by a Secure Telephone Identity Verification Service (STI-VS) which requires continuous updates of the telephone number authorization list.   
     
     
         2 . The method of  claim 1 , comprising:
 when the service provider code matches the service provider network identifier as an entry in a table, verifying the call to be completed.   
     
     
         3 . The method of  claim 1 , comprising:
 when the service provider code does not match the service provider network identifier as an entry in a table, blocking the call.   
     
     
         4 . The method of  claim 1 , wherein the call message is a session initiation protocol (SIP) INVITE message and the calling number of the call origination device is identified from the SIP INVITE message. 
     
     
         5 . The method of  claim 1 , comprising a table, comprising service provider network identifiers and the corresponding service provider codes, is stored in the public certificate. 
     
     
         6 . The method of  claim 1 , comprising:
 identifying the service provider network identifier assigned to the calling number of the call origination device.   
     
     
         7 . The method of  claim 6 , comprising:
 identifying, via a table, the service provider network identifier has an entry that matches the service provider code.   
     
     
         8 . An apparatus comprising:
 a processor configured to   retrieve a public certificate issued by a call origination provider responsive to a call being placed, to a secure telephone identity certificate repository (STI-CR) accessible by the termination service provider, wherein the public certificate identifies a storage location of a telephone number authorization list comprising service provider codes associated with a call origination device;   determine a service provider network identifier identifies a service provider network that supports the call origination device, based on a calling number of the call origination device;   retrieve a telephone number authorization list and the service provider codes from a public certificate assigned to the service provider network based on a link that identifies a public certificate repository and a public key stored in an identity header of a call message;   determine whether the service provider code matches the service provider network identifier; and   block or verify the call based on the match determination; wherein a verification service is processed by a Secure Telephone Identity Verification Service (STI-VS) which requires continuous updates of the telephone number authorization list.   
     
     
         9 . The apparatus of  claim 8 , wherein when the service provider code matches the service provider network identifier as an entry in a table, verify the call to be completed. 
     
     
         10 . The apparatus of  claim 8 , wherein when the service provider code does not match the service provider network identifier as an entry in a table, block the call. 
     
     
         11 . The apparatus of  claim 8 , wherein the call message is a session initiation protocol (SIP) INVITE message and the calling number of the call origination device is identified from the SIP INVITE message. 
     
     
         12 . The apparatus of  claim 8 , comprising a table, comprising service provider network identifiers and the service provider codes that correspond, is stored in the public certificate. 
     
     
         13 . The apparatus of  claim 8 , comprising:
 identify the service provider network identifier assigned to the calling number of the call origination device.   
     
     
         14 . The apparatus of  claim 13 , comprising:
 identify the service provider network identifier has an entry that matches the service provider code.   
     
     
         15 . A non-transitory computer readable storage medium configured to store instructions that when executed cause a processor to perform:
 retrieving, via a call termination service provider, a public certificate issued by the call origination provider responsive to a call being placed, to a secure telephone identity certificate repository (STI-CR) accessible by the termination service provider, wherein the public certificate identifies a storage location of a telephone number authorization list comprising corresponding service provider codes associated with a call origination device;   determining a service provider network identifier identifies a service provider network supporting the call origination device, based on a calling number of the call origination device;   retrieving, via the call termination service provider, a telephone number authorization list and the service provider codes from a public certificate assigned to the service provider network based on a link identifying a public certificate repository and a public key stored in an identity header of a call message;   determining, via the call termination service provider, whether the service provider code matches the service provider network identifier; and   blocking or verifying the call based on the match determination; wherein a verification service is processed by a Secure Telephone Identity Verification Service (STI-VS) which requires continuous updates of the telephone number authorization list.   
     
     
         16 . The non-transitory computer readable storage medium of  claim 15 , wherein the processor is further configured to perform:
 when the service provider code matches the service provider network identifier as an entry in a table, verifying the call to be completed.   
     
     
         17 . The non-transitory computer readable storage medium of  claim 15 , wherein the processor is further configured to perform:
 when the service provider code does not match the service provider network identifier as an entry in a table, blocking the call.   
     
     
         18 . The non-transitory computer readable storage medium of  claim 15 , wherein the call message is a session initiation protocol (SIP) INVITE message and the calling number of the call origination device is identified from the SIP INVITE message. 
     
     
         19 . The non-transitory computer readable storage medium of  claim 15 , wherein the processor is further configured to perform:
 identifying the service provider network identifier assigned to the calling number of the call origination device.   
     
     
         20 . The non-transitory computer readable storage medium of  claim 15 , wherein the processor is further configured to perform:
 identifying, via a table, the service provider network identifier has an entry that matches the service provider code.