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threat detection and response (TDR)

Threat detection and response (TDR) is the process of identifying potential threats and reacting to them before they impact the business.
threat modeling

Threat modeling is a procedure for optimizing application, system or business process security by identifying objectives and vulnerabilities, and then defining countermeasures to prevent or mitigate the effects of threats to the system.
three-factor authentication (3FA)

Three-factor authentication (3FA) is the use of identity-confirming credentials from three separate categories of authentication factors -- typically, the knowledge, possession and inherence categories.
time-based one-time password

A time-based one-time password (TOTP) is a temporary passcode generated by an algorithm that uses the current time of day as one of its authentication factors.
timing attack

A timing attack is a type of side-channel attack that exploits the amount of time a computer process runs to gain knowledge about or access a system.

tokenization

Tokenization is the process of replacing sensitive data with unique identification symbols that retain all the essential information about the data without compromising its security.
total risk

Total risk is an assessment that identifies all the risk factors associated with pursuing a specific course of action.
Transport Layer Security (TLS)

Transport Layer Security (TLS) is an Internet Engineering Task Force (IETF) standard protocol that provides authentication, privacy and data integrity between two communicating computer applications.
TrickBot malware

TrickBot is sophisticated modular malware that started as a banking Trojan but has evolved to support many different types of attacks, including ransomware.
triple extortion ransomware

Triple extortion ransomware is a type of ransomware attack where a cybercriminal extorts their victim multiple times, namely by encrypting data, exfiltrating data to expose and threatening a third attack vector.
Trojan horse

In computing, a Trojan horse is a program downloaded and installed on a computer that appears harmless, but is, in fact, malicious.
trusted computing base (TCB)

A trusted computing base (TCB) is everything in a computing system that provides a secure environment for operations.
two-factor authentication (2FA)

Two-factor authentication (2FA), sometimes referred to as two-step verification or dual-factor authentication, is a security process in which users provide two different authentication factors to verify themselves.
two-step verification

Two-step verification is a process that involves two authentication steps performed one after the other to verify that someone or something requesting access is who or what they say they are.
Twofish

Twofish is a symmetric-key block cipher with a block size of 128 bits and variable-length key of size 128, 192 or 256 bits.