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SIGNED MESSAGE HEADER STORING SENDER ACCOUNT AUTHENTICATION METHOD

  • US 20200137081A1
  • Filed: 10/24/2019
  • Published: 04/30/2020
  • Est. Priority Date: 10/30/2018
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a delivering email system configured to;

    receive a request from a sender to send an email to a recipient;

    identify an authentication method of a sender account for the email;

    modify one or more email headers of the email to include an indication of the authentication method;

    generate one or more digital signatures for the email that include the one or more email headers within a scope of the one or more digital signatures;

    modify the email such that an email header of the email includes the one or more digital signatures; and

    transmit the email, including the indication of the authentication method and the one or more digital signatures, to the recipient at a receiving email system; and

    the receiving email system configured to;

    receive the email having the one or more email headers indicating the authentication method of a sender account of the email and the one or more digital signatures of the one or more email headers;

    determine that the one or more email headers are unaltered by validating the one or more digital signatures against a public key of the sender domain of the email;

    determine whether the authentication method indicated in the one or more email headers meets a criteria; and

    execute, in response to the authentication method failing the criteria, a security response against the email.

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