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Domain Based Security
"Domain Based Security", abbreviated to "DBSy", is a model-based approach to help analyze information security risks in a business context and provide a clear and direct mapping between the risks and the security controls needed to manage them. A variant of the approach is used by the UK government's HMG Infosec Standard No.1 technical risk-assessment method. DBSy is a registered trade mark of QinetiQ Ltd. DBSy was developed in the late 1990s by the Defence Evaluation and Research Agency (DERA). It is a model-based approach to information assurance that describes the requirements for security in an organisation, taking account of the business that needs to be supported. The model is based around the concept of a security domain, which represents a logical place where people work with information using a computer system, and which has connections with other security domains where this is necessary to support business activity. Hence the focus is on the information that needs pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Purple Penelope
Purple Penelope was a demonstration secure system created by the Defence Research Agency (DRA) in the UK. Its aim was to show that the security functionality of Windows NT could be extended to support users handling classified information. Security Model Purple Penelope implemented the Domain Based Security model which was developed for the UK Ministry of Defence by DRA to take advantage of using Commercial Off The Shelf (COTS) software to implement secure systems. Within a security domain access controls are designed to stop users from accessing material without a need-to-know and to prevent them making mistakes when handling classified data, while controls over sharing information between security domains are more stringent and defend against attacks and hold the users to account for their actions. The model calls for discretionary security labelling and role based access controls within a domain and user-sanctioned release of information from the domain coupled with a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Information Security
Information security, sometimes shortened to InfoSec, is the practice of protecting information by mitigating information risks. It is part of information risk management. It typically involves preventing or reducing the probability of unauthorized/inappropriate access to data, or the unlawful use, disclosure, disruption, deletion, corruption, modification, inspection, recording, or devaluation of information. It also involves actions intended to reduce the adverse impacts of such incidents. Protected information may take any form, e.g. electronic or physical, tangible (e.g. paperwork) or intangible (e.g. knowledge). Information security's primary focus is the balanced protection of the confidentiality, integrity, and availability of data (also known as the CIA triad) while maintaining a focus on efficient policy implementation, all without hampering organization productivity. This is largely achieved through a structured risk management process that involves: * identifying inform ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
System
A system is a group of Interaction, interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its environment (systems), environment, is described by its boundaries, structure and purpose and expressed in its functioning. Systems are the subjects of study of systems theory and other systems sciences. Systems have several common properties and characteristics, including structure, function(s), behavior and interconnectivity. Etymology The term ''system'' comes from the Latin word ''systēma'', in turn from Greek language, Greek ''systēma'': "whole concept made of several parts or members, system", literary "composition"."σύστημα" Henry George Liddell, Robert Scott, ''A Greek–English Lexicon'', on Per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Risk Analysis Methodologies
In simple terms, risk is the possibility of something bad happening. Risk involves uncertainty about the effects/implications of an activity with respect to something that humans value (such as health, well-being, wealth, property or the environment), often focusing on negative, undesirable consequences. Many different definitions have been proposed. The international standard definition of risk for common understanding in different applications is “effect of uncertainty on objectives”. The understanding of risk, the methods of assessment and management, the descriptions of risk and even the definitions of risk differ in different practice areas ( business, economics, environment, finance, information technology, health, insurance, safety, security etc). This article provides links to more detailed articles on these areas. The international standard for risk management, ISO 31000, provides principles and generic guidelines on managing risks faced by organizations. Definition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Security
Data security means protecting digital data, such as those in a database, from destructive forces and from the unwanted actions of unauthorized users, such as a cyberattack or a data breach. Technologies Disk encryption Disk encryption refers to encryption technology that encrypts data on a hard disk drive. Disk encryption typically takes form in either software (see disk encryption software) or hardware (see disk encryption hardware). Disk encryption is often referred to as on-the-fly encryption (OTFE) or transparent encryption. Software versus hardware-based mechanisms for protecting data Software-based security solutions encrypt the data to protect it from theft. However, a malicious program or a hacker could corrupt the data to make it unrecoverable, making the system unusable. Hardware-based security solutions prevent read and write access to data, which provides very strong protection against tampering and unauthorized access. Hardware-based security or assiste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Security In The United Kingdom
A computer is a machine that can be programmed to carry out sequences of arithmetic or logical operations (computation) automatically. Modern digital electronic computers can perform generic sets of operations known as programs. These programs enable computers to perform a wide range of tasks. A computer system is a nominally complete computer that includes the hardware, operating system (main software), and peripheral equipment needed and used for full operation. This term may also refer to a group of computers that are linked and function together, such as a computer network or computer cluster. A broad range of industrial and consumer products use computers as control systems. Simple special-purpose devices like microwave ovens and remote controls are included, as are factory devices like industrial robots and computer-aided design, as well as general-purpose devices like personal computers and mobile devices like smartphones. Computers power the Internet, which links bill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vulnerability (computing)
Vulnerabilities are flaws in a computer system that weaken the overall security of the device/system. Vulnerabilities can be weaknesses in either the hardware itself, or the software that runs on the hardware. Vulnerabilities can be exploited by a threat actor, such as an attacker, to cross privilege boundaries (i.e. perform unauthorized actions) within a computer system. To exploit a vulnerability, an attacker must have at least one applicable tool or technique that can connect to a system weakness. In this frame, vulnerabilities are also known as the attack surface. Vulnerability management is a cyclical practice that varies in theory but contains common processes which include: discover all assets, prioritize assets, assess or perform a complete vulnerability scan, report on results, remediate vulnerabilities, verify remediation - repeat. This practice generally refers to software vulnerabilities in computing systems. Agile vulnerability management refers preventing attacks by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Threat (computer)
In computer security, a threat is a potential negative action or event facilitated by a vulnerability that results in an unwanted impact to a computer system or application. A threat can be either a negative " intentional" event (i.e. hacking: an individual cracker or a criminal organization) or an "accidental" negative event (e.g. the possibility of a computer malfunctioning, or the possibility of a natural disaster event such as an earthquake, a fire, or a tornado) or otherwise a circumstance, capability, action, or event.Internet Engineering Task Force RFC 2828 Internet Security Glossary This is differentiated from a threat actor who is an individual or group that can perform the threat action, such as exploiting a vulnerability to actualise a negative impact. A more comprehensive definition, tied to an Information assurance point of view, can be found in "''Federal Information Processing Standards (FIPS) 200, Minimum Security Requirements for Federal Information and Informa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IT Risk Management
IT risk management is the application of risk management methods to information technology in order to manage IT risk, i.e.: :''The business risk associated with the use, ownership, operation, involvement, influence and adoption of IT within an enterprise or organization'' IT risk management can be considered a component of a wider enterprise risk management system. The establishment, maintenance and continuous update of an information security management system (ISMS) provide a strong indication that a company is using a systematic approach for the identification, assessment and management of information security risks. Different methodologies have been proposed to manage IT risks, each of them divided into processes and steps. According to the Risk IT framework, this encompasses not only the negative impact of operations and service delivery which can bring destruction or reduction of the value of the organization, but also the benefit enabling risk associated to missing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biba Model
The Biba Model or Biba Integrity Model developed by Kenneth J. Biba in 1975, is a formal state transition system of computer security policy that describes a set of access control rules designed to ensure data integrity. Data and subjects are grouped into ordered levels of integrity. The model is designed so that subjects may not corrupt data in a level ranked higher than the subject, or be corrupted by data from a lower level than the subject. In general the model was developed to address integrity as the core principle, which is the direct inverse of the Bell–LaPadula model which focuses on confidentiality. Features In general, preservation of data ''integrity'' has three goals: * Prevent data modification by unauthorized parties * Prevent unauthorized data modification by authorized parties * Maintain internal and external consistency (i.e. data reflects the real world) This security model is directed toward data ''integrity'' (rather than ''confidentiality'') and is char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Information Flow (information Theory)
Information flow in an information theoretical context is the transfer of information from a variable x to a variable y in a given process. Not all flows may be desirable; for example, a system should not leak any confidential information (partially or not) to public observers--as it is a violation of privacy on an individual level, or might cause major loss on a corporate level. Introduction Securing the data manipulated by computing systems has been a challenge in the past years. Several methods to limit the information disclosure exist today, such as access control lists, firewalls, and cryptography. However, although these methods do impose limits on the information that is released by a system, they provide no guarantees about information ''propagation''.Andrei Sabelfeld and Andrew C. Myers. Language-Based Information-Flow Security. IEEE Journal on Selected Areas in Communications, 21(1), Jan. 2003. For example, access control lists of file systems prevent unauthorized fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Security Controls
Security controls are safeguards or countermeasures to avoid, detect, counteract, or minimize security risks to physical property, information, computer systems, or other assets. In the field of information security, such controls protect the confidentiality, integrity and availability of information. Systems of controls can be referred to as frameworks or standards. Frameworks can enable an organization to manage security controls across different types of assets with consistency. Types of security controls Security controls can be classified by various criteria. For example, controls are occasionally classified by when they act relative to a security breach: *Before the event, preventive controls are intended to prevent an incident from occurring e.g. by locking out unauthorized intruders; *During the event, detective controls are intended to identify and characterize an incident in progress e.g. by sounding the intruder alarm and alerting the security guards or police; *Afte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
