Introduction to blockchain consensus algorithms

What is Blockchain A blockchain is a record of digital transactions. It is a distributed software network which can function both as a digital ledger and as a mechanism allowing…

Advanced cryptography in blockchain

Blockchain is Built with Cryptography Blockchain technology is revolutionary.  It provides a completely different way of accomplishing a wide range of tasks, which has led to its widespread adoption. However,…

Blockchain second-layer protocols

The Limitations of the Blockchain Blockchain technology was a major innovation.  The original Bitcoin whitepaper, authored by the pseudonymous Satoshi Nakamoto, described the first system that made a fully decentralized…

Blockchain alternative distributed ledger architectures

Introduction to Alternative Distributed Ledger Architectures Blockchains are the original distributed ledger architecture, and the creation of blockchain was a major innovation.  However, blockchains also have their limitations, such as:…

8 of the world’s biggest insider threat security incidents

Introduction If you work in security or are just interested in the general area of cybersecurity you will no doubt have heard of the dreaded insider threat. In the context…

Analysis of ransomware used in recent cyberattacks on health care institutions

Introduction In recent years, there has been a steady increase in the number of ransomware attacks on healthcare institutions. The pressure such institutions experienced as a result of the COVID-19…

How WannaCry Ransomware Crippled Healthcare

Perspective What do you get when you combine stolen government hacking tools, an unpatched system, and shady operatives from North Korea? The answer is one seriously debilitating cyber attack. Using…