08-03-2009, 10:01 PM
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Proprietor
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Join Date: Nov 2008
Posts: 2,232
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KB12821 - Change the encryption method on the BlackBerry Enterprise Server
KB12821 - Change the encryption method on the BlackBerry Enterprise Server
Environment
- BlackBerry® Enterprise Server software version 4.0 and later
Overview
To correctly change the encryption method, complete the following steps:
- Change the encryption method to both Advanced Encryption Standard (AES) and Triple Data Encryption Standard (Triple DES). This will cause the BlackBerry Enterprise Server to regenerate encryption keys for all BlackBerry smartphone users.
- Make sure to leave the encryption method set to both long enough for all BlackBerry smartphone users to contact the BlackBerry Enterprise Server and be able to send and receive email messages after the switch. This time will vary depending on the environment.
- Change the encryption method to AES.
NOTE: A BlackBerry smartphone running a version of BlackBerry® Device Software earlier than 4.0 will not be able to communicate with a BlackBerry Enterprise Server set to use AES only.
Additional Information
The encryption method used by the BlackBerry Enterprise Server cannot be directly changed from AES to Triple DES or vice versa. Doing so will cause BlackBerry smartphones to become unable to communicate with the BlackBerry Enterprise Server until the BlackBerry smartphone users manually generate new encryption keys or cradle their BlackBerry smartphones.
As soon as the encryption method is switched, the BlackBerry Enterprise Server is no longer able to send packets to, nor accept packets from, the BlackBerry smartphone using the previous encryption method. This behavior is by design.
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