Installation guide

BlackBerry Enterprise Solution 32

• periodically runs the memory cleaner application, which tells BlackBerry device applications to empty any

caches and free memory associated with unused, sensitive application data

• automatically overwrites the memory freed by the memory cleaner application when it runs

Any of the following conditions enable the BlackBerry device to perform secure garbage collection:

• content protection is turned on

• an application uses the RIM Cryptographic Application Programming Interface (Crypto API) to create a

private or symmetric key

• a third-party application turns on secure garbage collection by registering with the memory cleaner

• S/MIME Support Package for BlackBerry devices is installed

• PGP Support Package for BlackBerry devices is installed

Setting memory clearing options

BlackBerry device users can set the memory cleaner application to run when their BlackBerry devices are

holstered or when their BlackBerry devices remain idle for a set period of time. BlackBerry device users can also

manually run the memory cleaner application on their BlackBerry devices, run specific registered memory

cleaners in the BlackBerry device Security Options, and turn the memory cleaner application on and off. If secure

garbage collection is turned on, when the memory cleaner application runs, it invokes the secure garbage

collection process.

The BlackBerry Enterprise Server administrator can set the memory cleaner application to run automatically

when the following actions occur:

• BlackBerry device user synchronizes the BlackBerry device with the computer

• BlackBerry device user locks the BlackBerry device

• BlackBerry device locks after a specified amount of idle time

• BlackBerry device user changes the time or time zone on the BlackBerry device

For more information, see the Policy Reference Guide.