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DID: 4046925<br />

UNCLASSIFIEDNFeR eFFl61AL ~SE eNbY<br />

Email Concerns<br />

Email is without a doubt <strong>the</strong> biggest source of security vulnerabilities on <strong>the</strong> Internet.<br />

All <strong>the</strong> qualities that make email so attractive to users-its speed, ease of use,<br />

inexpensiveness, and almost universal presence-also make it <strong>the</strong> perfect medium<br />

for spreading malicious software (malware). All <strong>the</strong> major virus, worm, and Trojan<br />

horse attacks have employed email to infiltrate networks worldwide. Therefore, email<br />

security is of <strong>the</strong> utmost importance to every user.<br />

I recommend <strong>the</strong>se two excellent <strong>web</strong>pages on email security that deal with all of <strong>the</strong><br />

issues addressed in section and more.<br />

Security Focus: "Securing Privacy: E-mail Issues"<br />

http://www.securityfocus.com/infocus/1579<br />

A Quick Guide to Email Security<br />

http://www.zzee.com/enh/email security.html<br />

Move Outlook and Outlook Express to <strong>the</strong> Restricted Zone187<br />

One of <strong>the</strong> conveniences and one of <strong>the</strong> weaknesses of Outlook and Outlook<br />

Express are <strong>the</strong>ir intimate relationship with <strong>the</strong> Internet Explorer browser. If you use<br />

ei<strong>the</strong>r Microsoft product for emau.ttis critical that you make sure <strong>the</strong>y are moved to<br />

<strong>the</strong> Restricted sites zone of <strong>the</strong> Internet from <strong>the</strong>ir default location in <strong>the</strong> Internet<br />

Zone. Why? Because malware is often spread via email, so you need to be sure<br />

your security settings for your email reader are set very high.<br />

By default, <strong>the</strong> Restricted sites zone is assigned <strong>the</strong> High security level. If you assign<br />

a site to <strong>the</strong> Restricted sites zone, it will be allowed to perform only minimal, very<br />

safe operations. However, I recommend you do not rely upon <strong>the</strong> zone slider being<br />

set to High; instead choose <strong>the</strong> Custom option for manual settings. It is not hard to<br />

do. Make sure your Restricted Zone settings are set to disable all Java, JavaScript,<br />

and ActiveX controls because <strong>the</strong>se are <strong>the</strong> most frequent sources of security<br />

problems in email.<br />

These are <strong>the</strong> generally accepted settings for <strong>the</strong> Restricted sites zone.<br />

187 Windows XP Service Pack 2 includes security upgrades to Outlook 2003 that are not covered<br />

here. Please see "Microsoft Outlook 2003 Security Tips" for more information.<br />

[PDF] (14 November 2006).<br />

UNCLASSIFIEDHFeR OFFl61AL l:J5E ONLY 543

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