When a file is deleted from a device the space for that file is merely de-allocated. In short: The DATA contained in that file still remains, and can be recovered. This can quickly become a security concern.
There are various areas of business where this scenario is unacceptable: HIPAA Protected Medical Information, and Financial Data amongst them. Client Data must be protected from recovery in the event of theft. Blue-Pencil was created to fulfill that.
"Blue-Pencil" protects sensitive data by "sanitizing" it - writing over it using special patterns designed to make data unrecoverable by traditional means before deletion thus keeping the data safe from prying eyes.
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