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From Konstantin Kolinko <>
Subject Re: Dynamic Security Constraints?
Date Sat, 10 Mar 2012 21:42:37 GMT
2012/3/10 André Warnier <>:
> 3) Before you even start this, it may be wise to do a quick back-of-hand
> calculation about the time it takes to download such a file over the average
> communications link. Tens of GB is hundreds of Gigabits. You may be
> surprised at the number of hours your customers would need, to download such
> a file.  Neither you nor them may be pleased at saturating your respective
> Internet links for the duration; nor at having to restart the download in
> case there's a hiccup after 90%.
> (tip : at 1 Mbit/s download speed, it would take close to 3 hours to
> download 1 Gbyte)
> It may be better to send them a USB stick by post..

They will have to use a download manager to resume downloads. E.g.
good old "wget".

Note that it cannot deal with "FORM" authentication (because it relies
on HTTP session and cookies), but it works good with BASIC (and maybe
with DIGEST) one and it works over HTTPS.

Using physical delivery is only good if you trust the courier.
Generally you have to encrypt the media. There was a story when postal
service lost magnetic tapes that one bank was sending to their backup

Best regards,
Konstantin Kolinko

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