Security Architecture Design Deployment And Operations Pdf


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Digital systems are almost always vulnerable, yet we increasingly depend on these systems. There will be many threats towards these system. In a fully networked system, the vulnerabilities will literally be exposed to the whole world.

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Security Architecture: Design, Deployment and Operations

Digital systems are almost always vulnerable, yet we increasingly depend on these systems. There will be many threats towards these system. In a fully networked system, the vulnerabilities will literally be exposed to the whole world. The exposed vulnerabilities may be transformed into attacks.

Threats are assessed, and various countermeasures are devised. The totality of these measures may be described as a security architecture. The goal of a security architecture will largely be to make the system robust and resilient in the face of an adversary. However, we shall argue that this is not enough. Security architecture designs should go one step further, and actually improve the defenses when faced with hostile actions. That is, the security architectures must become antifragile.

The requirements for a security architecture is very much about the level of uncertainty one wants to endure and the risks one is willing to take. There certainly are many technical aspects of modern information and communications technology ICT systems and the associated security architectures. Indeed, most of the aspect of how to achieve the goals tend to be of a technical nature.

However, questions concerning why need not be technical at all. That is, on a systems level, the end goal of a security architecture are normally not technical in nature.

Instead, the goals tend to be more philosophical. The distinction between the technical and concrete aspects and the philosophical aspects can be conceptualized as the difference between verification and validation.

Verification is largely about checking that something is done the correct way, whereas validation is concerned about whether one is doing the right thing.

It is of little use to do something correctly, if one is indeed doing the wrong thing in the first place. Modern ICT infrastructures are becoming integrated into our lives in many ways, and our society is poised to become even more dependent on these ICT systems. This means that safe and secure operations of these critical infrastructures literally becomes a matter of life and death.

No system can be made totally safe, but how safe should we try to make it? There may be efficiency penalties and incurred costs if security is to be improved, but then there may be human casualties if the security is inadequate. There are economical aspects to this, but also moral and ethical ones.

There are costs to having an inadequate system, but there are also costs to not having a system. What can be justified, and what cannot? These are complex matters. This is why there is a need for a philosophical stance when it comes to security architectures.

The need for security, safety and privacy is in many ways self-evident. Large-scale critical infrastructures is essential to society, and so the level of security, safety and privacy becomes a question about what kind of society one wants to have. We shall not dive into safety and privacy in this paper.

However, we argue that strong security is a necessary condition for both safety and privacy. This puts emphasis on the importance of an effective and comprehensive security architecture. Informally, the differences and relationships between security, safety and privacy can be stated as follows. Security is about the system, and protection of system entities and assets against threats.

Security specifically encompasses protection directed towards deliberate malicious threats. Safety is about being protected from harm, including actions that may cause harm. This includes risk control. Safety is often concerned about unintended consequences: that is, causes without any ill-intent behind. For critical infrastructures, one cannot have credible safety without having strong security.

Strong security is therefore a condition for safety. Lack of security implies lack of safety, but strong security does not automatically lead to credible safety. Privacy is always related to individuals. It pertains information related or linkable to persons. It also encompasses a right to have information deleted, not spread, etc. For ICT systems, one cannot have credible privacy without having strong security. Strong security is therefore a condition for privacy.

Lack of security implies lack of privacy, but strong security does not automatically lead to credible privacy. Given the above, it should be clear that strong security is a necessary, but not sufficient, prerequisite for both safety and privacy. Strong security will therefore need to be a system imperative.

The Incerto is a set of books and essays on uncertainty. Touted as an investigation of opacity, luck, uncertainty, probability, human error, risk, and decision making, the main body of the Incerto consists of five books by Nassim Nicolas Taleb. The books contains autobiographical sections, stories, parables, and philosophical, historical, and scientific discussions.

The books are:. Fooled by Randomness [ 1 ]. The Bed of Procrustes [ 3 ]. These books forms an edifice of scientific thinking, statistical finesse, empirical advice, philosophical thinking and ethical attitude. It truly represents a multidisciplinary approach. The Incerto is the inspiration behind this work on security architecture designs. In [ 4 ], Taleb defines an axis where he lists the traits fragile , robust and antifragile.

We shall prefer to use the term vulnerable instead of fragile , to keep closer to security parlance. Similarly, one may prefer to use resilient instead of robust.

These changes does not alter the essence of the classification. First, we need to define the three archetype states for our target system. The arrow in Fig. Furthermore, a system will have many components, and these should be classified individually. Security system-state archetypes:. There may exist vulnerabilities and there may be exposure, but many steps are taken to mitigate weaknesses.

The system is well defended. There may exist vulnerabilities and there may be exposure, but steps will be taken to mitigate weaknesses. Upon experiencing adversities, a host of measures will be taken to strengthen the system. One will learn from the incident, and improve on the system in as many ways as are practical.

The concept of archetype states is a tool for discussion, and not something to be taken as absolutes. We shall return to this topic in Sect. One normally carry out a requirements capture stage during the design phase.

There will be a number of basic requirements. These will include requirements for identification schemes, entity authentication, and authorization and access control arrangements. There will also be requirements for confidentiality- and integrity protection for data in transit and for data at rest. During the last decade, requirements for privacy has also become prevalent. High-level requirements for system hardening and server protection may be mentioned and recommended, but one tend to shy away from concrete recommendations.

The same can be said about security measures for detection and response. This is to be expected. These parts of a security architecture are much more dynamic and reactive in nature, making attempts at concrete recommendations difficult since it will be a moving target.

There will, however, be a number of optional features and aspects that simply is not standardized. Likewise, it will probably also be agnostic when it comes to system management aspects. There are also aspects that is related to business priorities, and those will normally not be part of any standardized specification.

To complete the security architecture, the security conscious operator will perform its own risk modeling, decide on a security policy and capture requirements correspondingly.

The design of the proactive parts of a security architecture will be explicitly specified. It will be possible to have a complete and consistent design for the proactive measures. What one can hope for is that the high-level requirements be precise, consistent, complete and clear. The other phases of a system life-cycle is less likely to be captured.

Threat modeling schemes seem, in general, to have a preference for practicality over a strong theoretical foundation. That is, they are designed to be pragmatic and efficient in finding threats. Completeness is a non-goal, while cost-effectiveness is important. The pragmatic approach is not only about cost-efficiency, but also about feasibility. More complex and comprehensive schemes would require system specialists and tool experts in order to carry out the modeling and analysis.

Clausewitz likely conceived of COG just subsequent of the Napoleonic wars. The first edition of the book dates back to A CoG item is some aspects that is deemed important and even essential to the system owner, and CoG threat modeling will focus on those aspects.

​Elements of a Good Security Architecture

By following the principles of defendable architecture, you will come a long way towards securing critical services. Reading Time: 7 minutes. In the previous article about threat intelligence driven defendable architecture , we talked about the process of defining a set of defensive controls through threat modelling and risk analysis. We are also going to look at how the implementation of these controls can be executed in a staged manner when conducting strategic technology modernisation investments to ensure that security is embedded in all technology projects and that the required investments are distributed more evenly. As a sample for how to implement a set of security controls for an IT or telco data center infrastructure, we will look at 14 defensive capabilities that have been defined and grouped into three main areas. This will in turn make them more effective in mitigating threats, and investments can spread out over time.

To maximize these security tools as well as existing policies and procedures, companies should implement a companywide architecture that integrates these different elements. This architecture should be a structured, coordinated activity consisting of the people, processes, and tools that work together to secure an organization's resources and should rely on the continuous flow of information throughout the entire organization to adapt to ongoing IT changes. To maximize audit efforts, new IT auditors need to understand the main components of a security architecture, the different frameworks for designing and evaluating an effective architecture, and how to assess the architecture's effectiveness. Effective and efficient security architectures consist of three components. These are the people, processes, and tools that work together to protect companywide assets.

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Security Architecture: Design, Deployment and Operations [Christopher King, Ertem Osmanoglu, Curtis Dalton] on goglc.org *FREE* shipping on qualifying​.


​Elements of a Good Security Architecture

Enter your mobile number or email address below and we'll send you a link to download the free Kindle App. Then you can start reading Kindle books on your smartphone, tablet, or computer - no Kindle device required. To get the free app, enter your mobile phone number. Design a secure solution from start to finish and learn the principles needed for developing solid network architecture using this authoritative guide. You'll find hands-on coverage for deploying a wide range of solutions, including network partitioning, platform hardening, application security and more.

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SEC offers an in-depth breakdown of security controls, services, and architecture models for public cloud environments. We cover brokering and security-as-a-service to help better secure SaaS access, containers and PaaS architecture and security considerations, and the entire spectrum of IaaS security offerings and capabilities. Between the lecture and a number of detailed hands-on labs, security operations, engineering, and architecture professionals will learn about all key areas of security controls in the cloud, how to properly architect them, the foundations of cloud defense and vulnerability management, as well as a primer on cloud security automation.

 Нет. Они сказали - агентство. АНБ. - Никогда о таком не слышал. Беккер заглянул в справочник Управления общей бухгалтерской отчетности США, но не нашел в нем ничего похожего.

Security Architecture Build Phase: Planning and building a defendable architecture

Сьюзан посмотрела на. Сидя рядом с великим Тревором Стратмором, она невольно почувствовала, что страхи ее покинули. Переделать Цифровую крепость - это шанс войти в историю, принеся громадную пользу стране, и Стратмору без ее помощи не обойтись.

И у стен есть. Бринкерхофф опустился на стул, слушая, как стук ее каблуков затихает в конце коридора.

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