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About PGP Whole Disk Encryption

Created: 15 May 2012 | 4 comments
jayson.kim's picture

About PGP Whole Disk Encryption, I know that pgp wde work sector-by-sector enccryption when wde start first time. but i donot understand really wde encrypt sector-by-sector?

when i start wde encryption on my pc's hdd 250GB, wde encrypt all it to 250GB. this disk has 100GB data and 150GB is not used free space why wde doest not encrypt sector-by-sector? if wde encrypt whole disk space at first time when using sector-by-sector method?

other question is when i off the pgp wde service and write new data on my disk how wde work? when wde encrypt it?

if anyone know it please let me know. thanks.

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Tom Mc's picture

As you are probably aware, when you delete a file, the operating system marks the space it occupies as available for use, but does not actually remove the data in those sectors.  If the WDE encryption was only to encrypt the sectors the operating system marks as being used, there would be a lot of data on your disk that is therefore not encrypted and which could be recovered in a forensic examination of the disk.  Some of that data may be confidential and in need of being securely encrypted. 

Please indicate the name of the service you are stopping in regards to the second question.

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jayson.kim's picture

thanks,

you means that pgp wde encrypt entire disk only? what's means sector-by-sector encryption in pgp wde intreoduce slides?

and 2nd question is that i kill that pgp service(all) on my pc is encrypted using pgp wde and i update data on my disk then how pgp wde know what is changed and how to encrypt it and when it process?

if pgp wde encrypt disk all sector at first time, 2nd question will be cleared. thanks

Tom Mc's picture

When you WDE encrypt a disk, every sector except for the sector(s) containing the PGP bootloader are encrypted.

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Tom Mc's picture

Do you need any further assistance with this?

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