US 12,149,633 B2
Enhancing domain keys identified mail (DKIM) signatures
Wei-Haw Chuang, Mountain View, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Filed by Google LLC, Mountain View, CA (US)
Filed on Apr. 1, 2022, as Appl. No. 17/657,678.
Prior Publication US 2023/0318844 A1, Oct. 5, 2023
Int. Cl. H04L 9/32 (2006.01); H04L 51/214 (2022.01); H04L 51/234 (2022.01); H04L 51/48 (2022.01)
CPC H04L 9/3247 (2013.01) [H04L 9/3271 (2013.01); H04L 51/214 (2022.05); H04L 51/234 (2022.05); H04L 51/48 (2022.05)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method when executed by data processing hardware causes the data processing hardware to perform operations comprising:
obtaining, at a message server, a message for a user of a message service hosted by the message server, the message comprising a header, the header comprising:
a digital signature signed by an author of the message; and
a list of one or more recipients of the message;
determining whether the digital signature by the author is valid;
determining, using the list of one or more recipients, whether the user is a declared recipient of the message;
when the digital signature by the author is valid and the user is the declared recipient of the message, indicating the message is authentic; and
when the digital signature by the author is valid and the user is not the declared recipient of the message, indicating the message is unauthentic.