US 11,722,464 B2
Symmetric account authentication
Hari Sivaraman, Livermore, CA (US); Uday Kurkure, Los Altos Hills, CA (US); Lan Vu, San Jose, CA (US); and Vijayaraghavan Soundararajan, Palo Alto, CA (US)
Assigned to VMWARE, INC., Palo Alto, CA (US)
Filed by VMware, Inc., Palo Alto, CA (US)
Filed on Feb. 28, 2019, as Appl. No. 16/288,453.
Prior Publication US 2020/0280544 A1, Sep. 3, 2020
Int. Cl. H04L 29/06 (2006.01); H04L 9/40 (2022.01)
CPC H04L 63/0435 (2013.01) [H04L 63/06 (2013.01); H04L 63/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for symmetric authentication by a first device, the method comprising:
generating a first challenge message containing a first string, wherein generating the first challenge message comprises inserting multiple instances of the first string in the first challenge message and an indicator of a number of the multiple instances;
encrypting the first challenge message;
transmitting the encrypted first challenge message to a second device;
receiving a first answer message from the second device;
decrypting the first answer message;
authenticating the second device based on determining the decrypted first answer message contains the first string;
upon successful authentication of the second device, the method further comprises:
receiving an encrypted second challenge message from the second device;
decrypting the encrypted second challenge message;
generating a second answer message containing a second string;
encrypting the second answer message; and
transmitting the encrypted second answer message to the second device.