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Provisioning Symmetric Keys in Mobile Devices that Lack Persistent Time-of-Day

IP.com Disclosure Number: IPCOM000183620D
Original Publication Date: 2009-May-29
Included in the Prior Art Database: 2009-May-29

Publishing Venue


Related People

Shanthi Thomas Anthony Metke Erwin Himawan Thomas Senese


This paper provides a brief description of how symmetric key provisioning currently occurs in public safety radios and how it can be improved using public key certificates. The improved method raises a serious concern. This concern arises due to some P25 radios not maintaining a persistent time of day. This paper identifies methods to mitigate this problem.