Blockchain and Hash Functions
Hash functions are cryptographic algorithms designed to protect the integrity of data. Hash functions have a few useful properties, including:
One-Way:...
Howard Poston
Howard Poston is a cybersecurity researcher with a background in cryptography and malware analysis. He has a Master’s degree in Cyber Operations from the Air Force Institute of Technology and two years of experience in cybersecurity R&D at Sandia National Labs. He currently provides consulting and technical content writing for cybersecurity, cryptocurrency, and blockchain.
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Blockchain and Asymmetric Cryptography
Blockchain technology makes it possible to solve business problems in ways that were previously impossible. A major enabler of this is the decentralization...
Security of the PKI Ecosystem
Public Key Infrastructure (PKI) is the backbone of trust for many systems on the Internet. One of the most common uses of PKI is the HTTPS protocol, which...
Elliptic Curve Cryptography
As its name suggests, elliptic curve cryptography (ECC) uses elliptic curves (like the one shown above) to build cryptographic algorithms. Because of the...
Attacking Block Creation
Blockchain is a relatively new technology that is achieving rapid adoption. It has a number of built-in protections and incentives designed to allow the decentralized...
Decrypting SSL/TLS traffic with Wireshark [updated 2021]
The internet wasn’t designed to be secure from the start. Many protocols (such as HTTP and DNS) were designed to serve their purpose of conveying information...
Cyber ranges: Who are they for and how can they help
The field of cybersecurity has a number of great books and references. Whether general overviews, deep dives into particular skill sets, or certification...
What types of cybersecurity skills can you learn in a cyber range?
A cyber range is an environment designed to provide hands-on learning for cybersecurity concepts. This typically involves a virtual environment designed to...
How to reserve a CVE: From vulnerability discovery to disclosure
A CVE, meaning Common Vulnerabilities and Exposure, is a publicly reported vulnerability in software products. Vulnerabilities are assigned CVE IDs to ensure...
Phishing with Google Forms, Firebase and Docs: Detection and prevention
The COVID-19 pandemic spurred a massive shift toward telework as companies tried to both stay operational and safe. One of the biggest impacts of this shift...