Browse Definitions :
Definition

entropy

Also see Claude Shannon .

Entropy has meanings in physics and in communications theory. More generally, entropy means a process in which order deteriorates with the passage of time. It has several special meanings in data communications.

Many scientists believe that the universe is naturally evolving toward a state of maximum entropy. The example commonly cited is the tendency for thermal differences to disappear. According to the so-called theory of entropy, everything in the universe will ultimately attain a uniform temperature. There will be no energy sources or absorbers. Stars and galaxies as we know them will cease to exist. There will be no life.

In data communications, the term entropy refers to the relative degree of randomness. The higher the entropy, the more frequent are signaling errors. Entropy is directly proportional to the maximum attainable data speed in bps (bits per second). Entropy is also directly proportional to noise and bandwidth . The entropy in a signal is inversely proportional to compressibility; the greater the entropy, the smaller the factor by which the data can be compressed. Entropy also refers to disorder deliberately added to data in certain encryption processes.

This was last updated in April 2005
SearchCompliance
  • smart contract

    A smart contract is a decentralized application that executes business logic in response to events.

  • compliance risk

    Compliance risk is an organization's potential exposure to legal penalties, financial forfeiture and material loss, resulting ...

  • information governance

    Information governance is a holistic approach to managing corporate information by implementing processes, roles, controls and ...

SearchSecurity
  • social engineering

    Social engineering is an attack vector that relies heavily on human interaction and often involves manipulating people into ...

  • distributed denial-of-service (DDoS) attack

    A distributed denial-of-service (DDoS) attack is one in which multiple compromised computer systems attack a target, such as a ...

  • password cracking

    Password cracking is the process of using an application program to identify an unknown or forgotten password to a computer or ...

SearchHealthIT
SearchDisasterRecovery
  • change control

    Change control is a systematic approach to managing all changes made to a product or system.

  • disaster recovery (DR)

    Disaster recovery (DR) is an organization's ability to respond to and recover from an event that affects business operations.

  • risk mitigation

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

SearchStorage
  • storage security

    Storage security is the group of parameters and settings that make storage resources available to authorized users and trusted ...

  • cloud storage

    Cloud storage is a service model in which data is transmitted and stored on remote storage systems, where it is maintained, ...

  • cloud data management

    Cloud data management is a way to manage data across cloud platforms, either with or instead of on-premises storage.

Close