Security Basics mailing list archives
RE: 51% can be enough Was: Wiping a drive
From: Alexander Klimov <alserkli () inbox ru>
Date: Sat, 18 Oct 2008 00:34:53 +0200 (IST)
On Thu, 16 Oct 2008, Olatunji Nowlin wrote:
I think he is stating that there is a 49% of correct recovery of EACH individual bit on the drive. My math could be rusty after all these years, but that would mean the chance of getting any two bits correct is 0.49*0.49 or 0.24 (24%),
I suspect you missed the point: each bit is noisy (low SNR), but if you have many copies of the same bit, then you can significantly increase SNR (see <http://en.wikipedia.org/wiki/Repetition_code>). -- Regards, ASK
Current thread:
- Wiping a drive: /dev/zero or /dev/urandom better? JW (Oct 14)
- RE: Wiping a drive: /dev/zero or /dev/urandom better? Weir, Jason (Oct 14)
- Re: Wiping a drive: /dev/zero or /dev/urandom better? Adam Gibbins (Oct 15)
- Re: Wiping a drive: /dev/zero or /dev/urandom better? Adriel Desautels (Oct 14)
- Re: Wiping a drive: /dev/zero or /dev/urandom better? Craig Wright (Oct 15)
- Re: Wiping a drive: /dev/zero or /dev/urandom better? Craig Wright (Oct 15)
- 51% can be enough Was: Wiping a drive Alexander Klimov (Oct 16)
- RE: 51% can be enough Was: Wiping a drive Olatunji Nowlin (Oct 16)
- RE: 51% can be enough Was: Wiping a drive Murda Mcloud (Oct 16)
- RE: 51% can be enough Was: Wiping a drive Alexander Klimov (Oct 20)
- Re: Wiping a drive: /dev/zero or /dev/urandom better? Craig Wright (Oct 15)
- RE: Wiping a drive: /dev/zero or /dev/urandom better? Weir, Jason (Oct 14)
- Re: Wiping a drive: /dev/zero or /dev/urandom better? Razi Shaban (Oct 16)
- Re: Wiping a drive: /dev/zero or /dev/urandom better? Ansgar Wiechers (Oct 16)
- Re: Wiping a drive: /dev/zero or /dev/urandom better? Roman Fulop (Oct 15)
- Re: Wiping a drive: /dev/zero or /dev/urandom better? Eric Kollmann (Oct 15)