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Chain Of Evidence

The “sequencing” of the chain of evidence follows this order: collection and identification; analysis; storage; preservation; presentation in court; return to owner. Chain of evidence shows who obtained the evidence; where and when the evidence was obtained; who secured the evidence; who had control or possession of the evidence. The process by which an object is uniquely identified in a court of law.


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<strong>Maturity Level Details:</strong><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Maturity levels consist of a predefined set of process areas. The maturity levels are measured by the achievement of the&nbsp;specific&nbsp;and&nbsp;generic goals&nbsp;that apply to each predefined set of process areas. The following sections describe the characteristics of each maturity level in detail.</p><strong>Maturity Level 1 - Initial</strong><br>At maturity level 1, processes are usually ad hoc and chaotic. The organization usually does not provide a stable environment. Success in these organizations depends on the competence and heroics of the people in the organization and not on the use of proven processes.<p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Maturity level 1 organizations often produce products and services that work; however, they frequently exceed the budget and schedule of their projects.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Maturity level 1 organizations are characterized by a tendency to over commit, abandon processes in the time of crisis, and not be able to repeat their past successes.</p><strong>Maturity Level 2 - Managed</strong><br>At maturity level 2, an organization has achieved all the&nbsp;specific&nbsp;and&nbsp;generic goals&nbsp;of the maturity level 2 process areas. In other words, the projects of the organization have ensured that requirements are managed and that processes are planned, performed, measured, and controlled.<p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">The process discipline reflected by maturity level 2 helps to ensure that existing practices are retained during times of stress. When these practices are in place, projects are performed and managed according to their documented plans.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">At maturity level 2, requirements, processes, work products, and services are managed. The status of the work products and the delivery of services are visible to management at defined points.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Commitments are established among relevant stakeholders and are revised as needed. Work products are reviewed with stakeholders and are controlled.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">The work products and services satisfy their specified requirements, standards, and objectives.</p><strong>Maturity Level 3 - Defined</strong><br>At maturity level 3, an organization has achieved all the&nbsp;specific&nbsp;and&nbsp;generic goals&nbsp;of the process areas assigned to maturity levels 2 and 3.<p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">At maturity level 3, processes are well characterized and understood, and are described in standards, procedures, tools, and methods.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">A critical distinction between maturity level 2 and maturity level 3 is the scope of standards, process descriptions, and procedures. At maturity level 2, the standards, process descriptions, and procedures may be quite different in each specific instance of the process (for example, on a particular project). At maturity level 3, the standards, process descriptions, and procedures for a project are tailored from the organization's set of standard processes to suit a particular project or organizational unit. The organization's set of standard processes includes the processes addressed at maturity level 2 and maturity level 3. As a result, the processes that are performed across the organization are consistent except for the differences allowed by the tailoring guidelines.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Another critical distinction is that at maturity level 3, processes are typically described in more detail and more rigorously than at maturity level 2. At maturity level 3, processes are managed more proactively using an understanding of the interrelationships of the process activities and detailed measures of the process, its work products, and its services.</p><strong>Maturity Level 4 - Quantitatively Managed</strong><br>At maturity level 4, an organization has achieved all the&nbsp;specific goals&nbsp;of the process areas assigned to maturity levels 2, 3, and 4 and the&nbsp;generic goals&nbsp;assigned to maturity levels 2 and 3.<p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">At maturity level 4 Subprocesses are selected that significantly contribute to overall process performance. These selected subprocesses are controlled using statistical and other quantitative techniques.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Quantitative objectives for quality and process performance are established and used as criteria in managing processes. Quantitative objectives are based on the needs of the customer, end users, organization, and process implementers. Quality and process performance are understood in statistical terms and are managed throughout the life of the processes.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">For these processes, detailed measures of process performance are collected and statistically analyzed. Special causes of process variation are identified and, where appropriate, the sources of special causes are corrected to prevent future occurrences.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Quality and process performance measures are incorporated into the organization.s measurement repository to support fact-based decision making in the future.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">A critical distinction between maturity level 3 and maturity level 4 is the predictability of process performance. At maturity level 4, the performance of processes is controlled using statistical and other quantitative techniques, and is quantitatively predictable. At maturity level 3, processes are only qualitatively predictable.</p><strong>Maturity Level 5 - Optimizing</strong><br>At maturity level 5, an organization has achieved all the&nbsp;specific goals&nbsp;of the process areas assigned to maturity levels 2, 3, 4, and 5 and the&nbsp;generic goals&nbsp;assigned to maturity levels 2 and 3.<p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Processes are continually improved based on a quantitative understanding of the common causes of variation inherent in processes.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Maturity level 5 focuses on continually improving process performance through both incremental and innovative technological improvements.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Quantitative process-improvement objectives for the organization are established, continually revised to reflect changing business objectives, and used as criteria in managing process improvement.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">The effects of deployed process improvements are measured and evaluated against the quantitative process-improvement objectives. Both the defined processes and the organization's set of standard processes are targets of measurable improvement activities.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">Optimizing processes that are agile and innovative depends on the participation of an empowered workforce aligned with the business values and objectives of the organization. The organization's ability to rapidly respond to changes and opportunities is enhanced by finding ways to accelerate and share learning. Improvement of the processes is inherently part of everybody's role, resulting in a cycle of continual improvement.</p><p style="margin: 0.8em 0px 1em; padding: 0px; text-align: justify; color: rgb(0, 0, 0); font-family: Helvetica, Arial, sans-serif; font-size: 12px;">A critical distinction between maturity level 4 and maturity level 5 is the type of process variation addressed. At maturity level 4, processes are concerned with addressing special causes of process variation and providing statistical predictability of the results. Though processes may produce predictable results, the results may be insufficient to achieve the established objectives. At maturity level 5, processes are concerned with addressing common causes of process variation and changing the process (that is, shifting the mean of the process performance) to improve process performance (while maintaining statistical predictability) to achieve the established quantitative process-improvement objectives.</p>
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The term “computer forensics” was coined in 1991 in the first training session held by the International Association of Computer Specialists (IACIS) in Portland, Oregon. Since then, computer forensics has become a popular topic in computer security circles and in the legal community. Like any other forensic science, computer forensics deals with the application of law to a science. In this case, the science involved is computer science and some refer to it as Forensic Computer Science. Computer forensics has also been described as the autopsy of a computer hard disk drive because specialized software tools and techniques are required to analyze the various levels at which computer data is stored after the fact. Computer forensics deals with the preservation, identification, extraction, and documentation of computer evidence. The field is relatively new to the private sector, but it has been the mainstay of technologyrelated investigations and intelligence gathering in law enforcement and military agencies since the mid1980s. Like any other forensic science, computer forensics involves the use of sophisticated technology tools and procedures that must be followed to guarantee the accuracy of the preservation of evidence and the accuracy of results concerning computer evidence processing. Typically, computer forensic tools exist in the form of computer software.
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A channel that conveys information by writing data to a common storage area where another process can read it. A covert channel that involves the direct or indirect writing of a storage location by one process and the direct or indirect reading of the storage location by another process. Covert storage channels typically involve a finite resource that is shared by two subjects at different security levels. Covert channel involving the direct or indirect writing to a storage location by one process and the direct or indirect reading of the storage location by another process. Covert storage channels typically involve a finite resource (e. g. , sectors on a disk) that is shared by two subjects at different security levels.
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<p>System Owner selects and documents the security controls for the system.<br>The system owner specifies the information security controls for the system being deployed based on functional requirements from the information owner.</p>
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Mirror image backups (also referred to as bitstream backups) involve the backup of all areas of a computer hard disk drive or another type of storage media (e. g. , Zip disks, floppy disks, Jazz disks, etc. ). Such mirror image backups exactly replicate all sectors on a given storage device. Thus, all files and ambient data storage areas are copied. Such backups are sometimes referred to as “evidencegrade” backups and they differ substantially from standard file backups and network server backups. The making of a mirror image backup is simple in theory, but the accuracy of the backup must meet evidence standards. Accuracy is essential and to guarantee accuracy, mirror image backup programs typically rely on mathematical CRC computations in the validation process. These mathematical validation processes compare the original source data with the restored data. When computer evidence is involved, accuracy is extremely important, and the making of a mirror image backup is typically described as the preservation of the “electronic crime scene. ”
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