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D

Dark Web

The Dark Web, also known as the Dark Net, is a part of the internet that is not accessible through regular web browsers or search engines. It can also be a private or hidden network not going through the Internet.  It is a hidden network of websites and servers that can only be accessed using specialized software, such as the Tor browser.

The Dark Web is often associated with illegal activity, such as drug trafficking, arms dealing, and child pornography. However, it is also used by individuals and organizations for legitimate purposes, such as anonymous communication and the protection of sensitive information.

Here are some examples of what you might find on the Dark Web:

  1. Illegal marketplaces: The Dark Web is home to numerous illegal marketplaces, where people can buy and sell drugs, weapons, and other illegal goods and services.

  2. Hacking tools: There are numerous websites on the Dark Web that offer hacking tools and services, such as malware, ransomware, and phishing kits.

  3. Anonymous communication: The Dark Web is often used as a means of anonymous communication, with people using it to share sensitive information or to communicate with others without fear of being monitored or tracked.

  4. Whistleblowing platforms: Some websites on the Dark Web provide a platform for individuals to anonymously share information about corruption or other wrongdoing.

Overall, the Dark Web is a complex and largely unregulated part of the internet that is often associated with illegal activity, but is also used for legitimate purposes. It is important to note that accessing the Dark Web can be risky, as it is often difficult to verify the legitimacy or safety of the content and individuals you may encounter there.



DarkMarket

A DarkMarket is a form of underground marketplace that exists on the dark web, where users can purchase illicit goods and services and remain anonymous. Traders on dark markets typically use virtual currencies and other financial methods that make their transactions untraceable.  Also called a dark web black market.


Data Breach

Unauthorized access or acquisition of sensitive information. Digital investigations into breaches often focus on intrusion vector, affected systems, exfiltration evidence, notification requirements, and correlating attacker infrastructure and artifacts across endpoints and logs.

Data Integrity

The assurance that data remains accurate, consistent, and unaltered except by authorized processes. Integrity is often verified using hashing, checksums, and journaling.

Data Lifecycle

The stages data goes through from creation and active use to archival and deletion. Effective lifecycle management supports compliance, security, and storage efficiency.

Data Minimization

Collecting only the data necessary to meet investigative objectives and legal scope. In digital cases, minimization reduces privacy impact and helps prevent over-collection, especially when searching large accounts or cloud datasets.

Data Redundancy

The duplication of data to improve reliability and fault tolerance. Techniques include RAID configurations, backups, and replication.

Data Type

A classification that describes what kind of value a variable can hold and what operations are valid (e.g., integer, float, string, boolean, array, dictionary). Some languages enforce types strictly, while others are more flexible.

Data written to HDDs

An analog hard disk drive (HDD) is a type of storage device that uses a spinning disk to store data. The data is written to the disk using a magnetic head, which reads and writes data to the surface of the disk.

There are three main methods of writing data to an analog HDD: longitudinal recording, perpendicular recording, and shingle recording.

  1. Longitudinal recording: In longitudinal recording, the magnetic head writes data to the disk in a series of parallel tracks, similar to the grooves on a vinyl record. The head moves radially across the disk, writing data to the tracks as the disk spins. This method was used in early HDDs, but has largely been replaced by newer methods.

  2. Perpendicular recording: In perpendicular recording, the magnetic head writes data to the disk by recording it vertically, or perpendicular, to the surface of the disk. This allows for higher data density and capacity, as more data can be stored in a smaller area. Perpendicular recording is the most common method used in modern HDDs.

  3. Shingle recording: In shingle recording, the magnetic head writes data to the disk in overlapping layers, similar to the way shingles overlap on a roof. This method allows for even higher data density and capacity, as more data can be stored in a smaller area. Shingle recording is a newer method that is not yet widely used in commercial HDDs.

Overall, the method of writing data to an analog HDD can have a significant impact on the capacity and performance of the device. Perpendicular recording and shingle recording allow for higher data density and capacity, but may also be more complex and require more advanced technology.



Data written to SSDs

Solid-state drives (SSDs) are a type of storage device that use non-volatile memory to store data. Unlike traditional hard drives, which use spinning disks to store data, SSDs do not have any moving parts and are therefore faster and more durable.

However, SSDs have some limitations compared to hard drives, particularly in terms of write endurance and wear leveling. In order to maximize the lifespan of an SSD and ensure that it performs optimally, it is important to understand how data is written to an SSD and how these limitations are addressed.

Write endurance refers to the number of times that data can be written to and erased from an SSD before it begins to degrade. SSDs have a finite number of write cycles, and if they are exceeded, the performance of the SSD can begin to degrade.

In order to address this issue, SSDs use a process called wear leveling, which evenly distributes writes across the entire drive in order to prevent any one area from being written to excessively. This helps to extend the lifespan of the SSD by ensuring that all areas of the drive are used evenly.

Another factor that affects the performance of an SSD is the type of non-volatile memory used to store data. SSDs use either single-level cell (SLC) or multi-level cell (MLC) memory, with SLC being faster and more durable but also more expensive.

SLC memory stores one bit of data per cell, while MLC memory stores two or more bits per cell. This allows MLC memory to store more data in a smaller space, but it also results in slower write speeds and a lower write endurance compared to SLC memory.

In conclusion, data is written to an SSD by storing it in non-volatile memory cells, which can be either SLC or MLC. In order to extend the lifespan of the SSD and ensure optimal performance, the write endurance of the drive is managed through wear leveling, which evenly distributes writes across the drive. The type of memory used in the SSD, SLC or MLC, can also impact the performance of the drive.




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