Challenge-response authentication
Challenge-response authentication: A method of authentication in which a server presents a question or challenge to a user or system seeking access, who must then provide a valid answer or response. This type of authentication is often used in scenarios where passwords alone are deemed insufficiently secure. The challenge is typically a random number, and […]
Cell
Cell: In the context of computer systems, a cell is a fundamental unit of data storage, often found in a grid within a database or a spreadsheet. Each cell is identified by its unique address, resulting from the combination of its corresponding row and column labels, and can hold a piece of data such as […]
Channel Service Unit/Digital Service Unit (CSU/DSU)
Channel Service Unit/Digital Service Unit (CSU/DSU): Hardware devices used in digital telecommunications to connect the end customer’s equipment with the public switched network. A CSU/DSU translates the digital signals produced by the customer’s equipment into signals that can be transmitted over the carrier’s network and vice versa. These devices are essential for enabling reliable data […]
Cell-level Encryption (CLE)
Cell-level Encryption (CLE): A database encryption method that encrypts individual cells, or fields, within a database table, allowing for fine-grained control over access to sensitive data. Each cell can be encrypted with a unique key, which prevents unauthorized users from reading the data while still allowing the database to perform complex queries, as the database […]
Channels
Channels: In a communication context, channels refer to the medium through which data is transmitted from one place to another. This could include physical channels, such as wires or fiber optic cables, and wireless channels, such as those used in radio or infrared communication. From a security perspective, protecting these channels is essential to ensure […]
Cache-timing Attack
Cache-timing Attack: A side-channel attack that exploits the timing information of a system’s cache to gain insights into the data and operations processed by the system. Attackers measure the time it takes to perform certain operations to make inferences about the data, such as cryptographic keys, in the cache. These attacks are sophisticated and rely […]