Ricoh Aficio SP C231N 기능 설명서 - 페이지 17

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Hard Drive (HDD) Encryption

This function can encrypt the system's hard drive to protect against data theft. Even if the hard drive

stolen, data will not be disclosed. The encryption methodology used is Advanced Encryption Standard

(AES) to 256 bits.

Document Protection

Finally, once a document has arrived at the output device for printing or storage, there needs to be

sufficient protection in place to guard against unintentional access, reprinting, distribution, or

modification for as long as the file resides in memory. Ricoh devices offer a number of features that

safeguard information until the owner decides to retrieve or delete it.

DataOverwriteSecurity System (DOSS)

Ricoh devices with hard disk drives installed, sometimes referred to as the Document Server, temporarily

store every document processed by Ricoh printers and MFPs whether copied, printed, faxed, or scanned.

While there are considerable benefits related to sharing stored documents among authorized users,

there is also the potential for unauthorized access,

theft, or falsification. The DataOverwriteSecurity

System (DOSS) eliminates these threats by overwriting

the hard disk after each job so that files cannot be

retrieved or recovered. Initially designed to meet gov-

ernment, military, and major account requirements for

document security, you can use DOSS to add value to

customers with all types of mission-critical documents

that require protection from leaks and unauthorized

distribution.

DOSS destroys temporary data (not documents stored to the Document Server or data saved in Address

Books) stored on device hard drives using one of three overwrite methods. Overwriting not only applies

to all copy and print jobs, but scanned files, Sample Print/Locked Print, and File Format Conversions as

soon as the job is completed:

■

NSA (National Security Agency) Standard: Overwrites the data three times: twice with random

numbers and once with zeros.

■

DoD (Department of Defense) Standard: Overwrites the temporary data with a fixed value, the fixed

value's complement, and then with random numbers. It then verifies the result.

■

Random Data Overwrite Standard: Allows users to overwrite temporary files with random numbers.

Users select how many times the files will be overwritten, up to a maximum of nine times. The default

is three times.