FIDO (Fast Identity Online) is an open standard developed to address authentication challenges and enhance online security. FIDO aims to replace reliance on passwords with more secure and user-friendly authentication methods, such as biometrics (e.g., fingerprints, facial recognition) and cryptographic authentication tokens (e.g., USB security keys).

FIDO2 is an authentication standard that builds upon the foundation of the FIDO protocol. It extends FIDO's capabilities by incorporating support for additional authentication methods beyond just passwordless authentication, such as biometrics and PINs, making it a more comprehensive and flexible solution for online security.

U2F (Universal 2nd Factor) is an open authentication standard developed to enhance security for online accounts and services. U2F is designed to provide strong two-factor authentication (2FA) using a physical security key, such as a USB or NFC device, along with a traditional password or PIN.

OpenPGP (Open Pretty Good Privacy) is an open-source encryption standard designed to provide secure communication and data protection. It employs a combination of asymmetric encryption and digital signatures to ensure the confidentiality, integrity, and authenticity of messages and files.

SNMP (Simple Network Management Protocol) is a protocol used for monitoring and managing network devices and systems. It provides a standardized framework for collecting and organizing information about network devices, such as routers, switches, servers, printers, and other network-connected devices. SNMP enables network administrators to remotely monitor device status, performance metrics, and other vital information, as well as to configure and control network devices.