The FREE Cybersecurity Glossary by Thor Pedersen!

Application-Level Gateway Firewall: A type of firewall that operates at the application layer of a network's protocol stack. It filters incoming traffic to certain network services like FTP and Telnet servers and can inspect the actual content of the data packets, not just the source, destination, and port. This allows for a more thorough examination of the packet payload to detect malicious code or protocols, offering a higher level of security compared to other types of firewalls.

Application Programming Interface (API): A set of protocols and tools for building software and applications. An API specifies how software components should interact, serving as an intermediary that allows different programs to communicate with each other. They are often thought of as a translator who sits in between different applications and does not speak the same language.

Application proxy: A type of software that acts as an intermediary between a client and a server in order to provide security, performance, and functionality to the client. It is commonly used in network security to protect against cyber threats and to improve network performance. Examples of application proxies include web proxy, FTP proxy, and SOCKS proxy.

Application Security: The practice of safeguarding applications from threats and vulnerabilities to ensure the confidentiality, integrity, and availability of the data they handle. Application security focuses on securing the software itself through practices like secure coding, input validation, and security testing, including vulnerability scanning and penetration testing. Examples of application security measures include code reviews, secure development practices, and the implementation of security patches. While broader measures like firewalls and intrusion detection systems contribute to overall cybersecurity, application security centers specifically on protecting the application layer.

Application System: This consists of a group of applications working together to deliver a certain function or service, often involving multiple user interfaces, databases, and processes. These systems can be complex and interconnected, making their security crucial. Ensuring the integrity, confidentiality, and availability of data in these systems is a fundamental part of maintaining secure operations.

Approved APIs: These are Application Programming Interfaces that have been vetted and approved for use within a certain environment. They are recognized as meeting certain criteria for security, reliability, and performance. Using approved APIs is important to maintain the security of applications and systems, as unauthorized or malicious APIs can introduce vulnerabilities or cause data breaches.