Computer Forensics: Permanent Erasing
Computer Forensics: Permanent Erasing
Prepared By : Yousef T. Aburabie and Mohamd Alomari Supervised By: Dr. Lo'ai Tawalbeh, New York Institute of Technology (NYIT)-Jordan's campus-2006
Introduction
"Delete" does not mean "Permanent Erase"
Today more and more people have sensitive information that they would like to protect from falling into the wrong hands. If your hard disk contains valuable corporate trade secrets, business plans, personal files or confidential letters, you must know that the delete function does not erase, wipe or overwrite the information beyond recovery.
When you delete a file, the operating system does not destroy the file contents from the disk - it only deletes some "references" on the file from some system tables. Any software recovery tool can restore the data if it hasn't been overwritten or thoroughly erased.
Introduction
Why we delete a file ? Freeing the disk space Removing duplicate or unnecessary data to avoid confusion Making sensitive information unavailable to others
Introduction
As a result, your confidential information may be lying unprotected on your disk (not wiped, overwritten or erased) and it is almost impossible to prevent it from falling into the wrong hands We will take a look at popular programs that do just that: like: East-Tec Eraser .
Recycle Bin in Brief
The recycle bin was introduced in Windows95. Recycle Bin holds data that not only lists deleted files, but also the date, time and the path of those files.
By default, the recycle bin is configured to hold 10% of the total capacity of the default hard disk drive. For example, on a hard drive with a capacity of 20 gigabytes, the recycle bin will hold up to 2 gigabytes. If the recycle bin fills up to maximum capacity, the oldest files will be deleted in order to accommodate the newly deleted files.
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