Commercial off-the-shelf IoT system solutions: A risk assessment
The Internet of Things (IoT) is growing rapidly. IoT devices provide convenience and can be a more efficient and cost-effective solution to a variety of different...
Howard Poston
Howard Poston is a cybersecurity researcher with a background in blockchain, 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 research and development at Sandia National Labs. He currently works as a freelance consultant providing training and content creation for cyber and blockchain security.
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Breaking misused stream ciphers
Encryption algorithms can be classified in a couple of different ways. A top-level distinction is between symmetric encryption algorithms (which use the same...
Entropy calculations
Entropy is a measure of the randomness in a system. The more random the system, the less predictable it is and the higher its entropy. Entropy is useful...
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:...
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 below) 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...