US 12,407,504 B2
Link safety guarantee
Jeffrey Wolfeld, Palo Alto, CA (US); Hancheng Hsiung, Fremont, CA (US); and Ze Li, San Jose, CA (US)
Assigned to CISCO TECHNOLOGY, INC., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Feb. 21, 2023, as Appl. No. 18/171,973.
Prior Publication US 2024/0283643 A1, Aug. 22, 2024
Int. Cl. H04L 9/08 (2006.01); H04L 9/30 (2006.01); H04L 9/32 (2006.01)
CPC H04L 9/088 (2013.01) [H04L 9/30 (2013.01); H04L 9/3247 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, at a first user device, an input from a user of the first user device, the input including a link to a resource;
transmitting, by the first user device, a request to a client link service to determine whether a web risk service has indicated that the link is safe;
receiving, at the first user device, a response indicating that the link is safe and including a link safety guarantee, the link safety guarantee including a signature signed by a private key associated with the client link service; and
transmitting the link and the link safety guarantee to one or more second user devices, wherein the one or more second user devices verify the signature using a public key associated with the client link service.