How to Write an Information Security Policy
An Information Security Policy is the cornerstone of an Information Security Program. It should reflect the organization's objectives for security and the agreed upon management strategy for securing information.
* Which types of information do you rely on to make decisions?
* Are there any information types that are more of a concern to keep private than others?
From these questions, an information classification system can be developed (e.g. customer info, financial info, marketing info, etc), and appropriate handling procedures for each can be described at the business process level. (Editor's note: See also Jason Stradley's provocative take on data classification and related issues.)
Of course, a seasoned security professional will also have advice on how to mold the management opinions with respect to security into a comprehensive organizational strategy. Once it is clear that the security professional completely understands management's opinions, it should be possible to introduce a security framework that is consistent with it. The framework will be the foundation of the organization's Information Security Program, and thus will service as a guide for creating an outline of the information security policy.
Also see CSOonline.com's Security and Business: Communication 101
Often, a security industry standards document is used as the baseline framework. For example, the Security Forum's Standard of Good Practice (www.securityforum.org), the International Standards Organization's, Security Management series (27001, 27002, 27005, www.iso.org), and the Information Systems Audit and Control Association's Control Objectives for Information Technology (CoBIT, www.isaca.org). This is a reasonable approach, as it helps to ensure that the policy will be accepted as adequate not only by company management, but also by external auditors and others who may have a stake in the organization's Information Security Program.
However, these documents are inherently generic and do not state specific management objectives for security. So they must be combined with management input to produce the policy outline. Moreover, it is not reasonable to expect the management of an organization to change the way the organization is managed in order to comply with a standards document. Rather, the information security professional may learn about good security management practices from these documents, and see if it is possible to incorporate them into the current structure of the target organization.
It is important that security policy always reflect actual practice. Otherwise, the moment the policy is published, the organization is not compliant. It is better to keep policy as a very small set of mandates to which everyone agrees and can comply than to have a very far-reaching policy that few in the organization observe. The Information Security Program can then function to enforce policy compliance while the controversial issues are simultaneously addressed.
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