ISO 27001 2005 and ISO 27002 2005 Information Security Standards

ISO IEC 27001 vs ISO IEC 27002*

* ISO IEC 27002 2005 was previously known as ISO IEC 17799 2005

ISO 27001 is an information security management standard. It's purpose
is to help organizations to establish and maintain an Information Security
Management System (ISMS). It defines a set of requirements that must
be met if you want your ISMS to be formally certified.

ISO 27001 is also an ISMS development methodology. It explains how
to create an ISMS. However, it doesn't tell you what kind of elements
make up an ISMS. That's what ISO 27002 2005 is all about.

ISO 27002 (17799) lists all the bits and pieces that combine to make up
an ISMS. It presents a detailed list of generally accepted information
security management practices. ISO 27001 asks you to select only those
security practices that address your security risks and requirements.

The information security management practices that make
up ISO 27002 are organized in the following way:

Security Objectives (for ISO 27001)
Security Controls (for ISO 27001)
Implementation Guidance
Other Information

ISO 27001 asks you to select the Security Objectives and Security Controls
(1 and 2 above) that address your unique security risks and requirements,
and then to use this information to prepare what ISO calls a Statement of
Applicability. This Statement of Applicability is, in turn, used to prepare a
detailed Risk Treatment Plan. Once you've implemented this Plan, you've
established an ISMS, one that meets your organization's unique
information security needs and requirements.

Fortunately, the ISO 27002 (17799) Security Objectives and Security
Controls are included with the ISO 27001 standard (and our Title 35),
so you don't have to purchase ISO 27002 (17799) in order to build
your ISMS. However, if you also want to get additional detailed
implementation guidance (item 3 above) and other related information
(item 4), you will have to purchase ISO 27002 (17799) or our Title 37.

ISO 27001 and ISO 27002 (17799) are Information Security Standards

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