The FREE Cybersecurity Glossary by Thor Pedersen!

High Performance Computing (HPC) systems: A type of computer system that is designed to handle extremely large and complex computing tasks at high speeds. These systems are often used in scientific research, financial modeling, and data analysis. Examples include supercomputers, grid computing systems, and clusters of computers working together.

Hijacking: In cybersecurity, hijacking refers to various forms of unauthorized control over a computing resource, like taking over web sessions, diverting network traffic, or commandeering system functions. It often results in data breaches, service disruption, or facilitating further attacks such as spamming or phishing from a trusted source.

Hijacking attacks: A type of cyberattack in which an attacker takes control of a legitimate user's session or network connection without the user's knowledge or consent. This concept is used in the context of computer security to describe attacks that aim to steal sensitive information or gain unauthorized access to a system. Examples of hijacking attacks include session hijacking, where an attacker takes control of a user's session, and man-in-the-middle attacks, where an attacker intercepts and modifies communications between two parties.

HITRUST (Health Information Trust Alliance): A common security framework used in the healthcare industry to ensure the privacy and security of electronic protected health information (ePHI). It is used by healthcare organizations to assess and mitigate risks to ePHI and to meet regulatory requirements. Examples of organizations using HITRUST include hospitals, clinics, and insurance companies.

Hoax: A deliberate deception or fabrication, often intended to trick or deceive others. It is commonly used in internet scams or fraudulent emails to lure victims into providing sensitive information or money. Examples include receiving an email claiming to be from a Nigerian prince offering a large sum of money in exchange for a small upfront investment or seeing a social media post claiming that a celebrity has died when they are actually alive and well.

Holistic redundancy: Holistic redundancy refers to a comprehensive approach to backup and fault tolerance that encompasses not just data protection but also system and operational resilience. It involves various strategies like data replication, failover systems, and regular testing to ensure all critical components of an IT ecosystem can withstand disruptions.