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- From: James_Zuchelli@qm.claris.com (James Zuchelli)
- Newsgroups: sci.crypt
- Subject: Re: Bitz & Bobz
- Message-ID: <15307@claris.com>
- Date: 13 Oct 92 20:38:58 GMT
- References: <memo.678738@cix.compulink.co.uk>
- Sender: news@claris.com
- Organization: Claris Corp
- Lines: 30
- Nntp-Posting-Host: zuchelli
-
- (deleted)
- >
- > >For a REALLY secure computer, just low-level format the HD after use.
- >
- > Try telling that to GCHQ/NSA! Governement regs involve repeated writes
- > of 0s then 1s (three times) followed by a single-byte written and verified.
- > This is because some people (including Dr.Solomon!) have equipment that can
- > rescue data from re-formatted discs!
-
- (deleted)
-
- I have heard that people in a certain government lab have reformatted a hard
- disk three times (or written 1's and 0's over it three times) and still been
- able to recover data. So the official word at that facility is that if you
- want to take a computer with a hard disk in it from a Secret area to a non-
- Secret area, you have physically destroy the hard disk.
-
- I personally have reformatted the ahrd disk on my Mac II, written 1's and 0's
- over the entire disk and then used a disk rescue program to recover recognia-
- ble fragments of files.
-
- In my opinion, once its written to disk it is there forever in one form or
- another (and don't forget tape recorders, under some circumstances if you
- erase an audio tape, you can recover fragments or even entire tracks of the
- erased tape. One Technician inLos Angeles was able to recover information
- from an erassed vcr tape.)
-
- James Zuchelli
- ---------------------
- The above is my personal opinion and not that of Claris Corp. or my employer.
-