User guide
The device can bind to another BlackBerry Enterprise Server at a later time. The device does not use the memory-scrub
process to overwrite the IT policy public key because it is not a protected or hidden value.
4. If applicable, deletes authentication information from the NV store
For example, the device deletes the binding information for the smart card. The device can bind to another smart card
at a later time.
5. Deletes data in the persistent store in application storage, including references to the device transport key and the copy
of the principal encryption key
6. If you or a BlackBerry device user turned on content protection, overwrites the copy of the principal encryption key with
zeroes
7. If applicable, formats the built-in media storage on the device
8. Overwrites the application storage with zeroes
9. Deletes the device password from the NV store
10. If you or a user turned on content protection, the memory-scrub process overwrites the file system of the device
application storage and built-in media storage
The memory-scrub process overwrites the device heap in RAM, which changes the state of each bit four times.
11. If you or a user specified that the data on the media card must be deleted, the memory-scrub process overwrites the
media card
12. Deletes the Device Under Attack flag from the NV store
Scrubbing the memory of a device when
deleting all device data
When you or a user deletes all BlackBerry device data for a device when content protection is turned on, the device runs
the memory scrub process to overwrite the device heap that is in RAM, the flash memory, and the files that a user saved on
the device.
Scrubbing the device heap in RAM when deleting all
device data
To overwrite the BlackBerry device heap that is in RAM for a device when content protection is turned on, the device
changes the state of each bit four times. The memory scrub process for a device performs the following actions:
1. writes 0x33 to each byte (0011 0011
2
)
2. writes all bytes to 0x00 (0000 0000
2
)
Security Technical Overview Device storage space
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