Browse Definitions :
Definition

behavior blacklisting

Behavior blacklisting is a security method based on detecting specified suspicious actions on the part of software or human agents and blocking access accordingly. Like behavior whitelisting, behavior blacklisting is used to secure email systems against spam and phishing attempts, to protect websites, services and forums from bots and hackers and to safeguard computers from malware and hacking attempts. Breach detection systems (BDS) also rely on behavior blacklisting to maintain network security.

Content-based filtering and IP-based blacklisting, the two most common methods used to block spam, are becoming less effective as spammers have adapted their own techniques to foil them. Blacklisting can catch a significant percentage of spam missed by those methods. In a behavior-based spam filter, instead of a record of IP addresses to be blocked as known offenders, the software tracks behaviors such as sending patterns. Similarly-sent suspected mass mailings are easily blocked. Web crawling bots that may spam or vandalize websites and forums can also be blocked because of  their recognizable scripted behaviors. Heuristics-based antivirus systems are essentially a form of behavior blacklisting, helping to detect new threats and especially new variants of existing viruses.

Behavior blacklisting is especially useful on machines that have many required functions and those that are constantly changing; it can take more work to update a whitelist in such variable environments. Nevertheless, the list of allowed software and network behaviors, code executed and email addresses that could be specified on a whitelist is typically shorter than a similar compliation for a blacklist. Blacklisting behavior ensures more unblocked capabilities to begin with but must be kept up to date, and that may require more work in the long run to keep pace with changing IPs, environments and threats.

This was last updated in January 2017

Continue Reading About behavior blacklisting

SearchCompliance
  • OPSEC (operations security)

    OPSEC (operations security) is a security and risk management process and strategy that classifies information, then determines ...

  • 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 ...

SearchSecurity
  • What is cybersecurity?

    Cybersecurity is the protection of internet-connected systems such as hardware, software and data from cyberthreats.

  • private key

    A private key, also known as a secret key, is a variable in cryptography that is used with an algorithm to encrypt and decrypt ...

  • DOS (disk operating system)

    A DOS, or disk operating system, is an operating system that runs from a disk drive. The term can also refer to a particular ...

SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

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

  • 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.

SearchStorage
  • RAM (Random Access Memory)

    RAM (Random Access Memory) is the hardware in a computing device where the operating system (OS), application programs and data ...

  • RAID 6

    RAID 6, also known as double-parity RAID, uses two parity stripes on each disk. It allows for two disk failures within the RAID ...

  • NOR flash memory

    NOR flash memory is one of two types of non-volatile storage technologies.

Close