Provisioning Symmetric Keys in Mobile Devices that Lack Persistent Time-of-Day
Original Publication Date: 2009-May-29
Included in the Prior Art Database: 2009-May-29
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.