ISO 27001 Annex : A.9 Access Control

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A.9.1 Business Requirements of Access Control
ISO 27001 Annex : A.9 Access Control Its Objective is limiting the access to information and information processing facilities.
A.9.1.1 Access Control Policy
Control- An access control policy with supporting business and information security requirements should be established, documented, and reviewed.
Implementation Guidance- Asset owners should lay down appropriate rules for access control, access rights, and limits on particular user roles to their assets, with the level of info and the strictness of controls representing the related information security risks. Access controls are both logical as well as practical, so they should be taken together. Users and service providers should be provided with a clear, transparent statement of the business requirements that access controls should meet.
The inbox is always open in my brain, and anyone can get in any time and access me. Turning it off is taking back control. I decide who gets in. It’s about privacy, having a self.-Jill Soloway
The policy should take note of:
  1. Security requirements applied to business applications;
  2. Information dissemination and authorization procedures, e.g. the need-to-know concept and extent of information access and information classification;
  3. Consistency between access rights and policies on the classification of information systems and networks;
  4. related legislation and other contractual obligations pertaining to information or information access controls;
  5. Access rights management in distributed and networked environments which recognizes the kinds of available connections;
  6. Segregation of access management functions, e.g. access request, access authorization, access administration;
  7. formal authorization requirements for access applications;
  8. Requirements for periodic review of the rights to access;
  9. Removing access rights
  10. Archiving details of all important incidents relating to the use and management of user identity and secret authentication information;
  11. Organization’s role with privileged access.
Other Information- When defining rules on access control, care needs to be taken to understand the following implications:
  • Establishing rules underpinned by the principle “Everything is generally prohibited unless expressly authorized” rather than the weaker rule “Everything is generally permitted unless expressly prohibited”;
  • Changes to information labels automatically introduced by information processing facilities and those implemented at the user’s discretion;
  • User authorization changes that are automatically initiated by an administrator and the information system;
  • Rules requiring specific prior approval and those without approval
  • Regulations on access control should be assisted by defined and structured procedures.
  • Access management based on responsibilities is a method that many organizations have successfully used in relating access rights to business roles.
In the guidelines of access control policy, two of the common principles are:
  1. Need-to-know: only the information you need to execute your tasks is accessible to you (specific tasks/roles mean different needs-to-know and therefore different access profiles);
  2. Need-to-use: you grant access to information processing facilities (IT software, programs, protocols, rooms) that you would need to execute your task/job/role.
In order to keep the organization’s assets (IT, software, programs, and protocols) safe, certain access controls are required to prevent unauthorized users from accessing your assets. The criteria for access management, access rights, and limitations of specific user roles on their assets are being defined in Annex 9 of Standard 27002. At Infosavvy, we do have certain standards to follow to ensure that our assets remain secure and that we apply for one of the most important information security certificates. i.e. IRCA CQI ISO 27001:2013 Lead Auditor (LA) and ISO 27001 Lead Implementer (LI) (TÜV SÜD Certification) . Our well-trained and professional trainers will help you by providing you with comprehensive information and several examples to enhance an applicant’s ability to handle security management, to ensure the right access to the right user.
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