|ISO 2700x - ISO 27002|
|Written by Administrator|
|Sunday, 30 March 2008 19:56|
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Information is an asset that needs to be suitably protected. Information security is achieved by implementing a suitable set of controls, including policies, processes, procedures, organizational structures and software and hardware functions.
An organization needs to establish an ISMS in order to be able to mange the various aspects of information security. Part of that is the identification of security requirements – these are mainly derived from:
Based on the identified security requirements, an organization then selects the security controls to achieve the desired risk level. What’s left is the residual risk, which is the amount of jeopardy an organization is willing to take (risk appetite).
This is where the ISO 27002 comes into play. It contains 11 security control clauses collectively containing a total of 39 main security categories with a bunch of objectives, controls and executive actions introducing risk assessment and treatment.
Controls considered being essential to an organization from a legislative point of view, due to the fact that most organization must comply with a couple of laws/regulations:
The eleven clauses (accompanied with the number of main security categories included within each clause) are:
a) Security Policy (1)
Each main security category consists of:
Control descriptions are structured as follows:
Basic risk management
Risk assessments should identify, quantify, and prioritize risks against criteria for risk acceptance and objectives relevant to the organization. Risk assessments should also be performed periodically to address changes in the security requirements and in the risk situation. The scope of a risk assessment can be either the whole organization, parts of the organization, an individual information system, specific system components, or services.
Treating security risks
Before considering the treatment of a risk, the organization should decide criteria for determining
Where it has been decided to implement appropriate controls to reduce risks, controls
Controls can be selected from this standard ISO 27002 or from any other control set, or new controls can be designed to meet the specific needs of the organization. The “Grundschutz” approach from the Bundesamt für Sicherheit in der Informationstechnik (BSI) is generally considered being effective and efficiency. By applying a standard set of controls a general level of information security can be achieved. Special controls are applied to protection objects with elevated security requirements only, as a result of a extended security analysis.
It should be kept in mind that no set of controls can achieve complete security, and that additional management action should be implemented to monitor, evaluate, and improve the efficiency and effectiveness of security controls to support the organization’s aims.
Clauses and security categories
In the following the 11 clauses and 39 main security categories from the ISO 27002 standard. Keep in mind, these are not the controls, it would be beyond the scope of this article to name them all – please refer to the standard for an overview.
Information security policy
Objective: To provide management direction and support for information security in accordance with business requirements and relevant laws and regulations.
Organization of information security
Objective: To manage information security within the organization.
Objective: To maintain the security of the organization’s information and information processing facilities that are accessed, processed, communicated to, or managed by external parties.
Responsibility for assets
Objective: To achieve and maintain appropriate protection of organizational assets.
Objective: To ensure that information receives an appropriate level of protection.
Human resources security
Prior to employment
Objective: To ensure that employees, contractors and third party users understand their responsibilities, and are suitable for the roles they are considered for, and to reduce the risk of theft, fraud or misuse of facilities.
Objective: To ensure that employees, contractors and third party users are aware of information security threats and concerns, their responsibilities and liabilities, and are equipped to support organizational security policy in the course of their normal work, and to reduce the risk of human error.
Termination or change of employment
Objective: To ensure that employees, contractors and third party users exit an organization or change employment in an orderly manner.
Physical and environmental security
Objective: To prevent unauthorized physical access, damage, and interference to the organization’s premises and information.
Objective: To prevent loss, damage, theft or compromise of assets and interruption to the organization’s activities.
Communications and operations management
Operational procedures and responsibilities
Objective: To ensure the correct and secure operation of information processing facilities.
Third party service delivery management
Objective: To implement and maintain the appropriate level of information security and service delivery in line with third party service delivery agreements.
System planning and acceptance
Objective: To minimize the risk of systems failures.
Protection against malicious and mobile code
Objective: To protect the integrity of software and information.
Objective: To maintain the integrity and availability of information and information processing facilities.
Network security management
Objective: To ensure the protection of information in networks and the protection of the supporting infrastructure.
Objective: To prevent unauthorized disclosure, modification, removal or destruction of assets, and interruption to business activities.
Exchange of information
Objective: To maintain the security of information and software exchanged within an organization and with any external entity.
Electronic commerce services
Objective: To ensure the security of electronic commerce services, and their secure use.
Objective: To detect unauthorized information processing activities.
Business requirement for access control
Objective: To control access to information.
User access management
Objective: To ensure authorized user access and to prevent unauthorized access to information systems.
Objective: To prevent unauthorized user access, and compromise or theft of information and information processing facilities.
Network access control
Objective: To prevent unauthorized access to networked services.
Operating system access control
Objective: To prevent unauthorized access to operating systems.
Application and information access control
Objective: To prevent unauthorized access to information held in application systems.
Mobile computing and teleworking
Objective: To ensure information security when using mobile computing and teleworking facilities.
Information systems acquisition, development and maintenance
Security requirements of information systems
Objective: To ensure that security is an integral part of information systems.
Correct processing in applications
Objective: To prevent errors, loss, unauthorized modification or misuse of information in applications.
Objective: To protect the confidentiality, authenticity or integrity of information by cryptographic means.
Security of system files
Objective: To ensure the security of system files.
Security in development and support processes
Objective: To maintain the security of application system software and information.
Technical Vulnerability Management
Objective: To reduce risks resulting from exploitation of published technical vulnerabilities.
Information security incident management
Reporting information security events and weaknesses.
Objective: To ensure information security events and weaknesses associated with information systems are communicated in a manner allowing timely corrective action to be taken.
Management of information security incidents and improvements
Objective: To ensure a consistent and effective approach is applied to the management of information security incidents.
Business continuity management
Information security aspects of business continuity management
Objective: To counteract interruptions to business activities and to protect critical business processes from the effects of major failures of information systems or disasters and to ensure their timely resumption.
Compliance with legal requirements
Objective: To avoid breaches of any law, statutory, regulatory or contractual obligations, and of any security requirements.
Compliance with security policies and standards, and technical compliance
Objective: To ensure compliance of systems with organizational security policies and standards.
Information systems audit considerations
Objective: To maximize the effectiveness of and to minimize interference to/from the information systems audit process.
|Last Updated on Sunday, 10 June 2012 09:32|