1) When was ISO 27001 be published?
In October 2005, although a final draft version was published some months prior to this.

2) Is it related to ISO 27002/17799?
Yes. It essentially described how to apply the controls defined within ISO 27002, and of course how to build and maintain and ISMS.

3) What is an accreditation body?
An organization which can authorize other organizations to issue certificates against the standard.

4) What is PDCA?
This standard for PLAN-DO-CHECK-ACT, and is a cycle described by ISO 27001 to enable continual improvement..

More coming soon....