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Trust is the belief and process leading to a belief in the reliability, truth, ability, or strength of someone or something. Ensuring trust is a key issue in maintaining the value of the Internet, and several organizations are devoted to meeting this objective, including ICANN and the Internet Society.[1]

Trusted Notifier

A Trusted Notifier is a designated entity for alerting Registries about illegal activity, content, and/or DNS Abuse associated with a domain name.[2]

Computer Science

In computer science, trust refers to the generation of authorities or user access/privileges through Cryptography. An entity trusts another entity when the first one makes the assumption that the second one will behave exactly as the first entity expects.[3] Trust is predictability. Identification, authentication, accountability, authorization, and availability support confidence in predictability. Trust is a set of binary relationships based on individual identity or unique characteristic validation.[4] A trust model identifies the specific mechanisms necessary to respond to a specific threat profile.


Blocklists, or reputation data feeds, play a significant role in cleaning up malicious activity and thus, maintaining trust in the Internet.


Trust has always played a role in human communication technology.[6], and people have long been able to take advantage of the networks that allow communication in part because trust dramatically expedites the flow of information.[7]

Social Engineering

Social engineering refers to malicious activities accomplished through human interactions that take advantage of social norms and expectations of trust. Such asttacks rely on psychological manipulation to trick users into making security mistakes or disclosing sensitive information.[8]


  1. On Trust, Internet Society
  2. Commerce Department Announces NTIA Pilot Program with HHS, FDA to Fight Illegal Online Opioid Sales
  3. ITU-T x.509
  4. Defining Trust, "Trust Modeling for Security Architecture Development," InformIT
  5. SP 800-207, NIST
  6. Peters, John Durham. Speaking into the Air: A History of the Idea of Communication. University of Chicago Press, 2012.
  7. Dutton, William H., and Adrian Shepherd. "Trust in the Internet as an experience technology." Information, Communication & Society 9, no. 4 (2006): 433-451.
  8. Raising Security Awareness, ICANN Blog