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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:05 ADT
William H. Geiger III (whgiii@invweb.net)
Wed, 18 Mar 98 20:44:38 -0500
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In <35100ECB.4466@nac.net>, on 03/18/98
at 01:13 PM, "Martin G. Diehl" <mdiehl@nac.net> said:
>> >Don't forget to snip that important information leak: your
>> >Internet connection...
>>
>> I *never* do any sensitive work on a network computer. I have a
>> shielded box that runs on battery power only (extra bonus points
>> if you know why it isn't connected to the local power grid). It's
>> a little old and slow but then again no one does any real work on
>> WinBlows so it's not a problem. :)
>Are you saying that a Standard UPS provides too little isolation?
Yes, yes I am. :)
Standard UPS's do not operate with their batteries "on-line" but in
standby mode. Because of this you do not get any of the filtering affect
from the batteries. You can get good "online" UPS's with gel-cell battery
banks but they cost $$$. Look at some of the companies that service the
telcom industry providing UPS for switchrooms. Line conditioning on the
standard UPS's (PC Decsktop grade) is medeocere at best and are designed
for leveling out power fluctuations not for filtering data leakage.
If Tempest is a serious concern I recomend a dual battery bank so one bank
can be charging while the other is in use. Physicial disconnects on both
battery banks between the computer and between outside power grid to
insure physicial issolation durring operations.
- --
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William H. Geiger III http://users.invweb.net/~whgiii
Geiger Consulting Cooking With Warp 4.0
Author of E-Secure - PGP Front End for MR/2 Ice
PGP & MR/2 the only way for secure e-mail.
OS/2 PGP 2.6.3a at: http://users.invweb.net/~whgiii/esecure.html
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Tag-O-Matic: OS/2: Bill Gates' worst nightmare!
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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:05 ADT