Paperkey 1.3

David Shaw dshaw at
Fri Jan 4 20:30:43 CET 2013

On Jan 4, 2013, at 9:27 AM, Johan Wevers <johanw at> wrote:

> On 04-01-2013 5:42, David Shaw wrote:
>> Paperkey 1.3 is released.
> You might want to update the website, it reads a bit outdated.
> CD/DVD-ROMs are going the way of the floppy disc; flash memory is much
> more reliable than either. Future support of USB ports or memory card
> readers seems the biggest concern for me.

That's a very good point.  Do you know of any studies on the projected life of flash when used as backup?  I've read anecdotal numbers as low as 5 years, and marketing claims are always huge (100 years!), but most of what I see is about the lifespan is when the flash is actively used (so running out of read/write cycles), rather than the on-the-shelf lifespan of already written data.

The few numbers I've seen at manufacturers websites about retention specifically, suggest it's around 10 years (depending on how well the flash is stored - heat makes it die quicker, etc).


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