Authenticating Data And Communication Sources

One or more computer-readable storage media storing instructions that when executed by one or more processors, causes the one or more processors to perform operations comprising:

• receiving a verification request to verify the source of a communication between a source computing device and a recipient computing device, the verification request comprising a second source identifier;
• determining, through accessing of a database, whether the database includes a first source identifier from among one or more user source identifiers stored in the database, the first source identifier matching the second source identifier;
• and
• when the database includes the first source identifier:
• identifying the user mapped to the first source identifier, wherein the first source identifier and the user are mapped using a digital certificate associated by the system with the user;
• and
• sending a response to the verification request to the recipient computing device, the response identifying the source of the communication as the user.

A system comprising:

• one or more processors coupled to memory, the one or more processors configured to:
• receive a registration request from a user to register the user, the registration request having first information including a digital certificate and a domain, and one or more source identifiers identifying sources of communication from the user to one or more computing devices;
• send, in response to the registration request, a challenge string;
• determine, by the one or more processors, whether one or more domain name system (DNS) records of the domain have been updated with the challenge string;
• and
• when the one or more domain name system (DNS) records of the domain have been updated with the challenge string:
• register the user as associated with the first information, and
• map the one or more source identifiers to the user.