how can existing SCADA systems be secured?
608857
A VPN is probably the most reasonable solution... the ideal of course is a dedicated intranet, but thats often times met with huge resistance.
764621
This is probably a good high level place to start:\n\nhttp://en.wikipedia.org/wiki/Computer_insecurity\n\nThis page offerrs a good overview of computer security in general, and many useful links elsewhere.
160600
Keeping it short...\n\nView this PDF:\nhttp://www.itl.nist.gov/div892/pubs/broadnets_wsan.pdf
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http://www.willamette.edu/~fthompso/MgmtCon/Control_Systems.html\n\n\nhttp://www.isd.mel.nist.gov/documents/falco/ITSecurityProcess.pdf#search='applications%20of%20digital%20control%20systems%20on%20different%20industries'\n\nhttp://www.cs.uidaho.edu/~krings/publications/SACT-2002-D.pdf#search='digital%20control%20systems%20in%20pipelines'\n\nTry them...
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Good enough. And here you have some more good and free options:\nhttp://askcomputerexpert.ws43.com/download/security.htm
245529
Security access systems using badges/cctv. Why - because you have lost control and alarms.
1114622
Ask for their permission nicely?\n\nSeriously, this is not the place to be asking how to be a l337 hax0r d00d. There are a number of very good security textbooks available if you're just starting out, and a number of much better web sites to look for information than Yahoo answers.\n\nGood luck.
20857
To get a full understanding listen to episode 13 of "Security Now!" It will give you a hand with wep/wpa (use wpa if you can) encryption, and how easy it is to do.  \n\nI also suggest using a encryption key from Gibson Research Corporation's password page.  Be sure to copy the password into a text document for safe keeping so you wont forget it.
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No, if you install the system you know how to side pass the system, while it is not hard to figure out if you install systems for a living, unless your 100 percent sure of the systems theres always opportunity for unnoted security features.
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Start here:\nhttp://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis4000/4000cn/1009rack.htm
36941
http://www.jimmyr.com/security.php
432393
Encryption, passwords.
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contact your ssystem administrator, he/she may know of anonymous sites you can bounce through
798623
Total security for home users!
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Found this site on the web which might answer your question. http://securitydriver.com/aic/stories/article-111.html \nHope it helps.
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http://service1.symantec.com/SUPPORT/tsgeninfo.nsf/docid/2005033108162039
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I am certain that there is always something or someone more powerfull that could hack it.  I think if you get a service that is responcible for loses due to hacking you will be safe.