Bing Liu. Gustavo Alonso. Alejandro Vaisman. Vipul Kashyap. Minos Garofalakis. Wilfried Grossmann. Carlo Batini. Elzbieta Malinowski. Zohra Bellahsene. Sven Casteleyn. Florian Daniel. Milan Petkovic.
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Stefano Ceri. Seppo Sippu. Roberto De Virgilio. Bestselling Series. Harry Potter. Popular Features. New Releases. Free delivery worldwide. Description The vision of ubiquitous computing and ambient intelligence describes a world of technology which is present anywhere, anytime in the form of smart, sensible devices that communicate with each other and provide personalized services.
However, open interconnected systems are much more vulnerable to attacks and unauthorized data access. In the context of this threat, this book provides a comprehensive guide to security and privacy and trust in data management. Product details Format Paperback pages Dimensions x x Bestsellers in Computer Security.
Add to basket. The Cyber Effect Mary Aiken. Real-world Bug Hunting Peter Yaworski.
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Preventing Data Breaches With App-Centric Security
Practical Mobile Forensics, Heather Mahalik. Democracy Hacked Martin Moore. Other books in this series. Data Matching Peter Christen. Web Data Mining Bing Liu. Web Services Gustavo Alonso.
Data Warehouse Systems Alejandro Vaisman. The Semantic Web Vipul Kashyap. Data Stream Management Minos Garofalakis. Fundamentals of Business Intelligence Wilfried Grossmann. Data Quality Carlo Batini. Schema Matching and Mapping Zohra Bellahsene. Engineering Web Applications Sven Casteleyn. Mashups Florian Daniel. According to the classic Gordon-Loeb Model analyzing the optimal investment level in information security, one can conclude that the amount a firm spends to protect information should generally be only a small fraction of the expected loss i. As with physical security , the motivations for breaches of computer security vary between attackers.
Some are thrill-seekers or vandals , some are activists, others are criminals looking for financial gain. Additionally, recent attacker motivations can be traced back to extremist organizations seeking to gain political advantage or disrupt social agendas. All critical targeted environments are susceptible to compromise and has led to a series of proactive studies on how to migrate the risk by taking into consideration motivations by these type of actors. Several stark differences exist between the hacker motivation and that of nation state actors seeking to attack based an ideological preference.
A standard part of threat modelling for any particular system is to identify what might motivate an attack on that system, and who might be motivated to breach it. The level and detail of precautions will vary depending on the system to be secured. A home personal computer , bank , and classified military network face very different threats, even when the underlying technologies in use are similar.
In computer security a countermeasure is an action, device, procedure, or technique that reduces a threat , a vulnerability , or an attack by eliminating or preventing it, by minimizing the harm it can cause, or by discovering and reporting it so that corrective action can be taken. Security by design , or alternately secure by design, means that the software has been designed from the ground up to be secure. In this case, security is considered as a main feature. The Open Security Architecture organization defines IT security architecture as "the design artifacts that describe how the security controls security countermeasures are positioned, and how they relate to the overall information technology architecture.
These controls serve the purpose to maintain the system's quality attributes: confidentiality, integrity, availability, accountability and assurance services ". Techopedia defines security architecture as "a unified security design that addresses the necessities and potential risks involved in a certain scenario or environment. It also specifies when and where to apply security controls. The design process is generally reproducible.
A state of computer "security" is the conceptual ideal, attained by the use of the three processes: threat prevention, detection, and response. These processes are based on various policies and system components, which include the following:. Today, computer security comprises mainly "preventive" measures, like firewalls or an exit procedure. A firewall can be defined as a way of filtering network data between a host or a network and another network, such as the Internet , and can be implemented as software running on the machine, hooking into the network stack or, in the case of most UNIX -based operating systems such as Linux , built into the operating system kernel to provide real-time filtering and blocking.
Another implementation is a so-called "physical firewall", which consists of a separate machine filtering network traffic. Firewalls are common amongst machines that are permanently connected to the Internet. Some organizations are turning to big data platforms, such as Apache Hadoop , to extend data accessibility and machine learning to detect advanced persistent threats. However, relatively few organisations maintain computer systems with effective detection systems, and fewer still have organized response mechanisms in place. As a result, as Reuters points out: "Companies for the first time report they are losing more through electronic theft of data than physical stealing of assets".
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Yet it is basic evidence gathering by using packet capture appliances that puts criminals behind bars. Vulnerability management is the cycle of identifying, and remediating or mitigating vulnerabilities ,  especially in software and firmware. Vulnerability management is integral to computer security and network security.
Vulnerabilities can be discovered with a vulnerability scanner , which analyzes a computer system in search of known vulnerabilities,  such as open ports , insecure software configuration, and susceptibility to malware. Beyond vulnerability scanning, many organizations contract outside security auditors to run regular penetration tests against their systems to identify vulnerabilities.
In some sectors, this is a contractual requirement. While formal verification of the correctness of computer systems is possible,   it is not yet common.