Atomicity does not behave completely orthogonally with regard to the other ACID properties of the transactions. For example, isolation relies on atomicity to roll back changes in the event of isolatio ...
Atomicity Main article: Atomicity (database systems)Atomicity requires that each transaction is "all or nothing": if one part of the transaction fails, the entire transaction fails, and the database s ...
A lock, as a read lock or write lock, is used when multiple users need to access a database concurrently. This prevents data from being corrupted or invalidated when multiple users try to read while o ...
An application typically crashes when it performs an operation which is not allowed by the operating system. The operating system then triggers an exception or signal in the application. Unix applicat ...
Data integrity can be roughly divided into two overlapping categories:Physical integrity - deals with challenges associated with correctly storing and fetching the data itself. Challenges with physica ...
If each component, in turn, can continue to function when one of its subcomponents fails, this will allow the total system to continue to operate as well. Using a passenger vehicle as an example, a ca ...
Databases and other data stores which treat the integrity of data as paramount often include the ability to handle transactions to maintain the integrity of data. A single transaction consists of one ...
References Jump up ^ Mullins, Craig (2002). Database administration: the complete guide to practices and procedures. Addison-Wesley. p. 703. ISBN 978-0-201-74129-2. Retrieved January 19, 2011. "Audit ...
Much of the theoretical work in cryptography concerns cryptographic primitives—algorithms with basic cryptographic properties—and their relationship to other cryptographic problems. More complicated ...
Until modern times cryptography referred almost exclusively to encryption, which is the process of converting ordinary information (called plaintext) into unintelligible text (called ciphertext). Decr ...
Physical security systems for protected facilities are generally intended to:deter potential intruders (e.g. warning signs and perimeter markings);distinguish authorized from unauthorized people (e.g. ...
Data security 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 en ...
Privileges can either be automatic, granted, or applied for.An automatic privilege exists when there is no requirement to have permission to perform an action. For example, on systems where people are ...
Vulnerability Assessments and Compliance One technique for evaluating database security involves performing vulnerability assessments or penetration tests against the database. Testers attempt to find ...
Database replication can be used on many database management systems, usually with a master/slave relationship between the original and the copies. The master logs the updates, which then ripple throu ...
