Transcript
Secure Deletion Of Data On The Cloud
By : Bhanu Priya Supervisor : Dr.Richard
Sinnott
Cloud Nectar
The Need For Secure Deletion Of Data On The
Cloud1) Used In Banks
Need For Secure Deletion Of Data On The Cloud
3) Cloud Used In Business
Need For Secure Deletion Of Data On The Cloud
Multiple Copies Of Data On The Cloud
Research Work :• Test Various Linux Based Secure Deletion Of Data
Tools .Test the basic linux utilities like (rm , rmdir etc).
• Test whether data can be recovered using linux based data recovery tools .
• Find the optimal solution for the use of secure deletion of data tools
• If Data is Removed from a single machine , the copies of that data should be removed from other virtual machines as well.The aim is to achieve parallel synchronisation of all the servers.
Secure Deletion Of Data Tools Used • Wipe wipe <filename>
• SRM sudo srm /path/to/file
• SHRED shred -u -z -n filename
• RM rm <filename>• SMEM smem [-f][-l][-l][-v]• SFILL sfill -f -v -ll
/path/to/directory• SSWAP cat /proc/swaps
Video Files :Video
File Size WIPE SHRED SRM RM RM -RF
1 kb 1 SEC 1 SEC 1 SEC I SEC 1 SEC10kb 1 SEC 1 SEC 1 SEC 1 SEC 1 SEC
100kb 1 SEC 1 SEC 1 SEC 1 SEC 1 SEC1Mb 1 MINUTE 1 SEC 2 SEC 1 SEC 1 SEC
100 Mb 3 MIN 53 S 1 MIN 5 MIN 1 SEC 1 SEC
1 Gb 1 HR 11 M 7 MIN 1 HR 10
M 1 SEC 1 SEC
10Gb 2 HR 45 M
1 HR 12 M > 3 HRS 1 SEC 1 SEC
10 Mb 2 MIN 1 MIN 1 MIN 1 SEC 1 SEC280.4 Mb 13 MIN 2 MIN 18 MIN 1 SEC 1 SEC
base 64 /dev/urandom | head -c <byte> > <filename>
IMAGE FILES :IMAGE FILE WIPE SHRED SRM
1 KB 1 SEC 1 SEC 1 SEC10 KB 1 SEC 1 SEC 1 SEC
100 KB 1 SEC 1 SEC 1 SEC1 MB 2 SEC 1 SEC 2 SEC
10 MB 13 SEC 2 SEC 1 MIN100 MB 4 MIN 1 MIN 6 MIN
1 GB 53 MIN 7 MIN 1 HR 20 MIN10 GB 2 HR 45 MIN 1 HR 12 MIN > 3 HOURS
TEXT FILES :
TEXT FILES WIPE SHRED SRM
1 KB 1 SEC 1 SEC 1 SEC
10KB 1 SEC 1 SEC 1 SEC
100 KB 1 SEC 1 SEC 1 SEC
1 MB 2 SEC 1 SEC 3 SEC
10 MB 13 SEC 3 SEC 39 SEC
100 MB 5 MIN 1 MIN 7 MIN
1 GB 54 MIN 9 MIN 1 HR 21 M
SMEM (Secure Memory)
• An Open source Tool To see , the users and the processors that are using the physical memory.
• It has three options.view the system wide memory usage , view the memory usage by each user,to view the memory usage by mapping .
smem -w
smem -u
sswap:
cat /proc/swaps
SFILL
• One Of The Secure-Delete Tools.
• It searches for free space in the specified partition and fills it up with some data to avoid recovery of data from the free space .
• syntax : sudo sfill /home.
photorec :1) Choose the partition to recover from
Photorec:
2) choose the file system to recover from
PhotoRec:
3) Select the type of file you want to recover
Photorec:
4) Select the file system again
Photorec :
5) select whether you want to recover the free space or the entire partition
Photorec6) select the destination of the recovered files
Photorec:
7) Recovery starts
Photorec:8) Recovery completed
Cluster SSH :
Comparison Of The Secure Deletion Of Data Tools On The Basis Of
Recovery By PhotoRec
Images Videos TextWipeShredSrm
rm
NO NO YES
NO NO YES
NO NO YES
YES NO YES
THANK YOU
By:Bhanu Priya
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