Elusive Thoughts

INTRODUCTION  Ethereum Smart Contracts and other complex blockchain programs are new, promising and highly experimental. Therefore, we should expect constant changes in the security landscape, as new bugs and security risks are discovered, and new best practices are developed [1].  This article is going to focus on threat modeling of smart contract applications. Threat modelling is a process by which threats, such as absence of appropriate safeguards, can be identified, enumerated, and mitigation can be prioritized accordingly. The purpose of threat model is to provide contract applications defenders with a systematic analysis of what controls or defenses need to be included, given the nature of the system, the probable attacker's profile, the most likely attack vectors, and the assets most desired by an attacker.  Smart contract programming requires a different engineering mindset than we may be used to. The cost of failure can be high, and change can be difficult, ...

Introduction The purpose of this paper is to emphasize in the importance of cryptography, focus in RSA asymmetric cryptographic algorithm and explain: What is cryptography Why cryptography is important History of Cryptography Mathematical RSA operations How to perform an RSA brute-force What is Cryptography Cryptography (or cryptology; from Greek κρυπτός, kryptos, "hidden, secret"; and γράφω, gráphō, "I write", or -λογία, -logia, respectively) is the practice and study of hiding information. Modern cryptography intersects the disciplines of mathematics, computer science, and engineering. Applications of cryptography include ATM cards, computer passwords, and electronic commerce. [2] Until recently cryptography referred mostly to encryption, which is the process of converting ordinary information (plaintext) into unintelligible gibberish (i.e. cipher-text). [4]  Decryption is the reverse, in other words, moving from...