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Developing a policy for instant messaging (IM) is a smart thing to do.
There are a large number of security implications that come with IM that
your users should be educated on and should be enforced within your
organization. Some key issues to keep in mind with your policy is to
make sure that its reasonable and fair, and make sure that its both
enforceable and enforced. Some key issues that your organization (and
information) is up against are logging issues (are conversations being
logged and by whom), firewall compromises (letting traffic in or out
that should otherwise be blocked), denial-of-service concerns,
encryption concerns, standardizing on one IM application, and malicious
code and other content-security vulnerabilities. IM is a great business
application, just make sure you understand the threats and
vulnerabilities associated with it, document it in a policy(ies) and
keep everyone in the loop. There is a good sample generic acceptable-usage policy at
http://www.sans.org/resources/policies/Acceptable_Use_Policy.doc that
can be translated for IM use.
For more information on this topic, visit these other SearchSecurity.com resources:
Ask the Expert: Blocking Yahoo Messenger at the firewall
Web Security Tip: Prevent hackers from sneaking in through IM
Best Web Links: Security Policy & Infrastructure
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