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All the Perl that's Practical to Extract and Report

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  • You divided by 4 twice - once when you went from 95 to 24, and again when you converted 6 months to 180/4. So, your result is one quarter of the real total...
  • I thought it was only the metadata anyway.. ie: a record of who connected/chatted where, rather than the actual transcript of the conversation.

    While I was actually reading the calculation (which seemed conservative, actually) - clearly, they'd be buying the largest possible disks for this use. Say 200GB disks (I'm sure there are larger). Assume a mean failure rate of 5% inside 6 months (again, conservative). If they (the ISPs) don't wish to say "sorry, that disk failed" when the authorities show up, they'

  • What's required is that ISPs and telco's only store the data to find out "who talked with whom". So, a telco needs to store who dialled which numbers (which they are already doing, as that's required to do write bills), and ISPs need to store who send an email to whom (what their mail logs are most likely already storing anyway), and who visits which websites (proxy logs?) On the one hand, that means that ISPs that save their mail logs on a tape, or burn it on a CD and forget to erase it after three months