- IT baseline protection
IT baseline protection signifies standard security measures for typical IT systems.
The foundation of an IT baseline protection concept is initially not a detailed risk analysis. It proceeds from overall hazards. Consequently, sophisticated classification according to damage extent and probability of occurrence is ignored. Three protection needs categories are established. With their help, the protection needs of the object under investigation can be determined. Based on these, appropriate personnel, technical, organizational and infrastructural security measures are selected from the IT Baseline Protection Manual.
The Federal Office for Security in Information Technology's IT Baseline Protection Manual offers a "cookbook recipe" for a normal level of protection. Besides probability of occurrence and potential damage extents, implementation costs are also considered. By using the Baseline Protection Manual, costly security analyses requiring expert knowledge are dispensed with, since overall hazards are worked with in the beginning. It is possible for the relative layman to identify measures to be taken and to implement them in cooperation with professionals.
The FSI grants a baseline protection certificate as confirmation for the successful implementation of baseline protection. In stages 1 and 2, this is based on self declaration. In stage 3, an independent, FSI-licensed
auditorcompletes an audit. Certification process internationalization has been possible since 2006. ISO 27001certification can occur simultaneously with IT baseline protection certification. (The ISO 27001 standard is the successor of BS 7799-2). This process is based on the new FSI security standards. This process carries a development price which has prevailed for some time. Corporations having themselves certified under the BS 7799-2 standard are obliged to carry out a risk assessment. To make it more comfortable, most deviate from the protection needs analysis pursuant to the IT Baseline Protection Manual. The advantage is not only conformity with the strict Federal Office for Security in Information Technology, but also attainment of BS 7799-2 certification. Beyond this, the FSI offers a few help aids like the policy template and the GSTOOL.
data protectioncomponent is available, which was produced in cooperation with the Federal Commissioners for Data Protection and Information Freedom and the state data protection authorities and integrated into the IT Baseline Protection Catalog. This component is not considered, however, in the certification process.
Baseline protection process
The following steps are taken pursuant to the baseline protection process during structure analysis and protection needs analysis:
* The IT network is defined.
* IT structure analysis is carried out.
* Protection needs determination is carried out.
* A baseline security check is carried out.
* IT baseline protection measures are implemented.
Creation occurs in the following steps:
* IT structure analysis (survey)
* Assessment of
* Selection of actions
* Running comparison of nominal and actual.
IT structure analysis
An IT network includes the totality of infrastructural, organizational, personnel, and technical components serving the fulfillment of a task in a particular information processing application area. An IT network can thereby encompass the entire IT character of an institution or individual division, which is partitioned by organizational structures as, for example, a departmental network, or as shared IT applications, for example, a personnel information system. It is necessary to analyze and document the information technological structure in question to generate an IT security concept and especially to apply the IT Baseline Protection Manual. Due to today's usually heavily networked IT systems, a
network topology planoffers a starting point for the analysis. The following aspects must be taken into consideration:
* The available
* The organizational and personnel framework for the IT network,
* Networked and non-networked IT systems employed in the IT network.
* The communications connections between IT systems and externally,
* IT applications run within the IT network.
Protection needs determination
The purpose of the protection needs determination is to investigate what protection is sufficient and appropriate for the information and information technology in use.In this connection, the damage to each application and the processed information, which could result from a breach of confidentiality, integrity or availability, is considered. Important in this context is a realistic assessment of the possible follow-on damages. A division into the three protection needs categories "low to medium", "high" and "very high" has proved itself of value. "Public", "internal" and "secret" are often used for confidentiality.
Heavily networked IT systems typically characterize information technology in government and business these days. As a rule, therefore, it is advantageous to consider the entire IT system and not just individual systems within the scope of an IT security analysis and concept. To be able to manage this task, it makes sense to logically partition the entire IT system into parts and to separately consider each part or even an IT network. Detailed documentation about its structure is prerequisite for the use of the IT Baseline Protection Manual on an IT network. This can be achieved, for example, via the IT structure analysis described above. The IT Baseline Protection Manuals components must ultimately be mapped onto the components of the IT network in question in a modelling step.
Baseline security check
The baseline security check is an organisational instrument offering a quick overview of the prevailing IT security level. With the help of interviews, the status quo of an existing IT network (as modelled by IT baseline protection) relative to the number of security measures implemented from the IT Baseline Protection Manual is investigated. The result is a catalog in which the implementation status "dispensable", "yes", "partly", or "no" is entered for each relevant measure. By identifying not yet, or only partially, implemented measures, improvement options for the security of the information technology in question are highlighted.
The baseline security check gives information about measures, which are still missing (nominal vs. actual comparison). From this follows what remains to be done to achieve baseline protection through security. Not all measures suggested by this baseline check need to be implemented. Peculiarities are to be taken into account! It could be that several more or less unimportant applications are running on a server, which have lesser protection needs. In their totality, however, these applications are to be provided with a higher level of protection. This is called the (
The applications running on a server determine its need for protection. In this connection, it is to be noted that several IT applications can run on an IT system. When this occurs, the application with the greatest need for protection determines the IT systems protection category.
Conversely, it is conceivable that an IT application with great protection needs does not automatically transfer this to the IT system. This may happen because the IT system is configured redundantly, or because only an inconsequential part is running on it. This is called the (
distribution effect). This is the case, for example, with clusters.
The baseline security check maps baseline protection measures. This level suffices for low to medium protection needs. This comprises about 80 % of all IT systems according to FSI estimates. For systems with high to very high protection needs, risk analysis based information security concepts, like for example
ISO 27001, are usually used.
IT Baseline Protection Catalog and standards
During its 2005 restructuring and expansion of the
IT Baseline Protection Manual, the FSI separated methodology from the IT Baseline Protection Catalog. The BSI 100-1, BSI 100-2, and BSI 100-3standards contain information about construction of an information security management system ( ISMS), the methodology or basic protection approach, and the creation of a security analysis for elevated and very elevated protection needs building on a completed baseline protection investigation. BSI 100-4, the "Emergency management" standard, is currently in preparation. It contains elements from BS 25999, ITILService Continuity Management combined with the relevant IT Baseline Protection Catalog components, and essential aspects for appropriate Business Continuity Management (BCM). Implementing these standards renders certificationis possible pursuant to BS 25999-2. The FSI has submitted the FSI 100-4 standards design for online commentary under [ [http://www.bsi.de/literat/bsi_standard/bsi-standard_100-4_v090.pdf "Entwurf BSI 100-4"] (pdf)] .
The FSI brings its standards into line with international norms this way.
* FSI: [http://www.bsi.bund.de/gshb/Leitfaden/GS-Leitfaden.pdf IT Baseline Protection Guidelines (pdf, 420 kB)]
* FSI: [http://www.bsi.bund.de/gshb/deutsch/download/it-grundschutz-kataloge_2006_de.pdf IT Baseline Protection Cataloge 2007] (pdf)
* FSI: [http://www.bsi.bund.de/literat/bsi_standard/index.htm FSI IT Security Management and IT Baseline Protection Standards]
* [http://www.humpert-partner.de/conpresso/_rubric/index.php?rubric=6 Frederik Humpert: "IT-Grundschutz umsetzen mit GSTOOL. Anleitungen und Praxistipps für den erfolgreichen Einsatz des BSI-Standards", Carl Hanser Verlag München, 2005.] (ISBN 3-446-22984-1)
* Norbert Pohlmann, Hartmut Blumberg: "Der IT-Sicherheitsleitfaden. Das Pflichtenheft zur Implementierung von IT-Sicherheitsstandards im Unternehmen", ISBN 3-8266-0940-9
* [http://www.bsi.bund.de/english/index.htm Federal Office for Security in Information Technology]
* [http://www.branchenbuch-it-sicherheit.de/ IT Security Yellow Pages]
* [http://www.bsi.bund.de/english/gstool/index.htm IT Baseline protection tools]
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