Glossary
Clarify your Cyber Security Vocabulary

A/AAAA Record
Maps a domain to an IPv4 (A) or IPv6 (AAAA) address.
Abuse Box feed
An email inbox used to receive abuse or misuse complaints related to a domain or service. Often required by registries, ISPs, or hosting providers.
Acceptable Use Policy
A written set of rules that define what a user can and cannot do when using a company's computers, networks, and internet.
Account suspension
Suspension of fraudulent emails or social media accounts.
Account Takeover (ATO)
A security incident in which an attacker gains unauthorized access to a legitimate user’s account, typically by stealing, guessing, or phishing their login credentials, and then uses that access to perform fraudulent or malicious actions.
Accredited domain registrars of a registry
Registrars that are officially recognized by a Registry to provide domain-related services.
Active Intrusive Reconnaissance
A type of active reconnaissance involving deeper probing or testing of the target system, which may be detectable and can cause impact.
Active Non-Intrusive Reconnaissance
A type of active reconnaissance where someone interacts with the target system in a careful and controlled way to gather information without causing disruption or noticeable impact.
Active Reconnaissance
Gathering information by directly interacting with the target system to identify services, responses, or potential weaknesses.
Adaptive Authentication
Also called risk-based authentication, is a security approach that dynamically adjusts access requirements based on real-time risk signals like user location, device, time, and behavior.
Advance Fee Fraud (419 Scam)
A scam where victims are promised a large amount of money but are first asked to pay a small upfront fee. After the payment is made, the scammer either asks for more fees or disappears.
Advance Fee Fraud/419 Scam/Nigerian 419
An advance-fee scam is a form of fraud and one of the most common types of confidence tricks. The scam typically involves promising the victim a significant share of a large sum of money, in return for a small up-front payment, which the fraudster requires in order to obtain the large sum. If a victim makes the payment, the fraudster either invents a series of further fees for the victim or simply disappears.
Adware
Software that shows unwanted ads on a device and may collect user information without permission.
Air Gap
Having a critical computer or machine in a physically isolated location as well as disconnecting it from the internet.
Alert Fatigue
When security teams become overwhelmed and desensitized by a massive volume of alerts, many being false positives, causing them to miss or ignore critical threats, leading to burnout, increased response times, and a compromised security posture.
Angler Phishing
An attack in which the fraudster will masquerade as a customer support representative on social media to send phishing links to customers in order to get their information such as username and password as well as other personal information.
Anonymous Proxy
An anonymous proxy is a server that acts as an intermediary for requests from clients seeking resources from other servers, but without revealing the user's IP address or other identifying information to the target server.
Anti-Forensics
Techniques and actions used to hide, change, or delete digital evidence to prevent cyber forensic investigations and make it hard to identify an attacker's actions or understand what happened.
Anti-Malware
Security software designed to prevent, detect, and remove malicious software (malware) like viruses, spyware, ransomware, and worms from computers and networks
Anti-Phishing
Methods, software, and strategies (like email filtering, website blocking, DMARC, training) designed to detect and stop cybercriminals from tricking individuals into revealing sensitive data through deceptive emails, texts, or websites that impersonate trusted entities, protecting users from identity theft and network breaches.
App permissions
Permissions requested by an application to access specific device features or data. Excessive or unnecessary permissions can pose privacy and security risks.
APT
Advanced Persistent Threat (APT) refers to a long-term, targeted cyberattack where the attacker remains undetected inside a network to spy, steal data, or manipulate systems over time.
Asset
Any hardware, software, data, or resource that holds value for an organization and is directly associated with or controlled by the organization.
Astroturfing
Astroturfing is abusing the power of customer reviews on sites like Yelp, Facebook, Amazon and others. Either a place of business will post rave reviews from fake customers about their product, or a business will post bad reviews about a competitor.
Attack Chain
Also known as the Cyber Kill Chain, it is a structured model that breaks down a cyberattack into stages, from initial research to achieving the attacker’s goal, helping organizations detect and stop attacks at any stage.
Attack Surface
The total sum of all possible entry points (vulnerabilities, misconfigurations, vectors) where an unauthorized user can try to access, extract data from, or cause an effect on a system, network, or application.
Attack Surface Reduction
The strategic process of identifying, managing, and minimizing all internet-facing assets, services, and entry points that attackers could exploit, thereby decreasing the overall risk of compromise.
Authentication
The process of confirming that a user is who they claim to be before allowing access.
Authorization
Giving a verified user permission to access specific systems, features, or data.
Auto-generated Emails
Programmatic emails triggered and sent by backend systems or application workflows without direct human drafting, including automated password resets, system alerts, out-of-the-office emails and auto-responders.
Autonomous System Number (ASN)
A unique number assigned to a network provider or large organization that controls routing.
Availability
Making sure systems and services are accessible and working when they are needed.
Backdoor
A hidden entry point in software or systems that allows bypassing normal authentication, often installed by attackers to regain access later.
Back links / Inward links
A backlink is any link received by a web node (web page, directory, website, or top level domain) from another web node.
Backscatter
Backscatter is an email phenomenon where a spoofed email address or domain receives automated bounce messages (Non-Delivery Reports or NDRs) for fraudulent emails that were never sent by the legitimate owner. This happens because attackers forge the sender's address, causing the bounce notifications to be delivered to the spoofed address.
Banner Grabbing
A technique to gather intelligence about network services by capturing the "banner" (info messages) sent by servers when a connection is made, revealing software names, versions, and operating systems; useful for defenders to map assets but also for attackers to find known vulnerabilities (CVEs) for exploitation.
Baseline Security
The foundational, minimum set of security controls and configurations an organization implements to protect its IT systems and data from common threats.
Bastion Host
A host with very few services/applications running on it, usually put between the internal network and the internet. This point acts as a proxy and is the only entry point to the internal network.
Benchmarking
The process of comparing practices, performance, or risk levels against standards, best practices, or similar organizations to identify gaps and improvements.
BGP
Border Gateway Protocol used to exchange information about routing between AS Numbers.
BGP peers
When BGP runs between two peers in the same autonomous system (AS), it is referred to as Internal BGP (iBGP or Interior Border Gateway Protocol). When it runs between different autonomous systems, it is called External BGP (EBGP or Exterior Border Gateway Protocol).
BGP route
When BGP runs between two peers in the same autonomous system (AS), it is referred to as Internal BGP (iBGP or Interior Border Gateway Protocol). When it runs between different autonomous systems, it is called External BGP (EBGP or Exterior Border Gateway Protocol).
BIMI (Brand Indicators for Message Identification)
An inbox visual standard that renders an organization’s official trademarked logo alongside authenticated messages, transforming strong email authentication (DMARC) into instant brand trust for the recipient.
BIN
Bank Identification Number. Which is the starting digits of a credit card, most commonly 6 or 8 digits.
Bitsquatting
Refers to the registration of a domain name one bit different than a popular domain. The name comes from typo-squatting: the act of registering domain names one key press different than a popular domain.
BitTorrent
A peer-to-peer file-sharing protocol that allows users to distribute large files, but it is often abused by attackers to spread malware or illegal content.
Blackbox Testing - Whitebox testing - Graybox Testing
The hacker does not know the in/outs of the IT infrastructure. Usually launches a full scale brute force attack to reveal vulnerabilities. Can be very time consuming.\n
Black Hat
A hacker who identifies and exploits vulnerabilities for malicious purposes or personal gain, often breaking laws or causing harm.
Black Hat SEO
In search engine optimization (SEO) terminology, Black Hat SEO refers to the use of aggressive SEO strategies, techniques and tactics that focus only on search engines and not a human audience, and usually does not follow search engine guidelines.
Blended Attack
A cyber attack that comprises multiple attack vectors and malware is known as a blended attack. Such attacks usually cause severe damage to targeted systems.



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