What is blockchain technology?

A distributed ledger where transactions are recorded in 'blocks' chained together — once recorded, data is extremely difficult to alter because changing one block invalidates all subsequent blocks A type of encryption that chains multiple layers of security together A programming technique that breaks code into small blocks for security A database where data is stored in blocks of exactly equal size

What is 'cryptocurrency' and how does blockchain enable it?

Digital currency secured by cryptography and operating on a blockchain — the decentralized ledger prevents double-spending and removes the need for banks as trusted intermediaries Virtual currency that only exists inside video games and can't be exchanged for real money Encrypted digital versions of national currencies issued by governments A secret online payment system used exclusively for illegal transactions

What is quantum computing and how might it affect cybersecurity?

Computers using quantum mechanical phenomena (superposition, entanglement) to solve certain problems exponentially faster — threatening to break current encryption algorithms if powerful enough machines are built Extremely fast computers that use the quantum levels inside atoms to store more data A type of computer that is perfectly secure because quantum physics makes it unhackable Computers that operate at extremely low temperatures to run faster than regular computers

What is 'augmented reality' (AR) and what privacy concerns does it raise?

Overlaying digital information onto the real world through devices like smart glasses or phones — raises concerns about always-on cameras capturing people and locations without consent Virtual reality so realistic that users can't tell it apart from the real world Technology that enhances human physical abilities using robotic attachments Software that uses AI to improve or enhance photos and videos automatically

What is 'generative AI' and how has it changed the threat landscape?

AI that creates new content (text, images, audio, video, code) — it's lowered the skill barrier for creating convincing phishing, deepfakes, malware, and disinformation at scale AI that generates new security vulnerabilities to test if systems are protected A type of AI only used in video game design to create procedurally generated worlds AI that generates reports about security incidents from log data

What is '5G' and what security implications does it have?

The fifth generation of mobile networks — much faster, with lower latency and more capacity, enabling billions of IoT devices, but expanding the attack surface dramatically 5G is the same as 4G but with better range — it doesn't change security considerations 5G refers to the fifth generation of computer processors used in smartphones 5G is more secure than 4G because it uses stronger encryption by default

What is 'post-quantum cryptography'?

Encryption algorithms designed to be resistant to attacks from quantum computers — being developed now so that encrypted data remains secure when large quantum computers are eventually built Encryption that uses quantum entanglement to create unbreakable codes Encryption methods used after quantum computers have already broken older algorithms A temporary encryption standard used until quantum computers become available

What is 'edge computing' and why is it relevant to security?

Processing data near where it's generated (on devices or local servers) rather than sending it to a central cloud — reduces latency and can improve privacy but creates distributed security management challenges Security systems specifically designed to protect network edge routers from attack Computing that happens on the physical edges of buildings — in server rooms near exterior walls A type of cloud computing that only stores data at the geographic edge of a country

What is a 'digital twin' and what security concerns does it raise?

A real-time digital simulation of a physical object, system, or process — security concerns include that compromising the digital twin could reveal vulnerabilities in the real system Two identical backup computer systems that run simultaneously in case one fails An AI system that exactly mimics a human user's behavior for automation A cloned computer system used for software testing without affecting production

What does 'convergence of physical and cyber security' mean in modern infrastructure?

Physical systems (power grids, water treatment, hospitals) are now computer-controlled — a cyberattack can have real-world physical consequences like power outages, water contamination, or equipment failure Security guards who are also trained as network technicians to handle both physical and digital threats The requirement that physical security and cybersecurity teams must work in the same building A trend where physical security badges also act as digital authentication tokens