Ansible Basics 02: Installing Ansible

Ansible can be installed on a large variety of systems, but most people and companies run it on Linux hosts. Small companies and startups (with only a few administrators) do not dedicate a server for it, rather they use the admin workstations or notebooks. When a company grows and more people work on the environment they dedicate a server to these operations, and Ansible can scale well. In this article we go through the different alternative methods to install Ansible.

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Ansible Basics 01: Automation, Configuration Management, Infrastructure as Code

The Ansible Basics course is a new, free series from Tom’s IT Cafe for those who want to learn the foundations of automation, configuration management and infrastructure as code. The structure of the course is simple, starting with the installation of Ansible, through its configuration, to some examples of the usage. You have to understand some computer basics to fully understand this topic. This article series will not go into the details of networking, identity and access management nor security hardening. It will help you start working with Ansible, and initiate your automation journey. New articles on Tuesdays and Thursdays at 5PM CET.

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Cryptocurrencies and Privacy Coins

In recent years, the world of cryptocurrencies has expanded exponentially, offering a plethora of options for investors, traders, and enthusiasts. Among these digital assets, both major cryptocurrencies and privacy coins have garnered significant attention. Each category comes with its own set of advantages and disadvantages, catering to different needs and preferences within the crypto community.

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Ethereum: The Future of Decentralized Finance

In the blockchain technology, Ethereum stands out as a groundbreaking platform that has transformed the landscape of decentralized applications (DApps) and smart contracts. Launched in 2015 by Vitalik Buterin, Ethereum introduced a revolutionary concept: the ability to build decentralized applications on its blockchain, using smart contracts to execute code automatically when predetermined conditions are met. Over the years, Ethereum has evolved into a powerhouse, fueling the growth of decentralized finance (DeFi), non-fungible tokens (NFTs), and a myriad of other innovative projects.

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Proton Mail’s New Desktop Client: A Secure and User-Friendly Email Solution

Proton Mail, a renowned provider of secure email services, has recently released its new desktop client, setting a new standard for email security and usability. This innovative client offers a range of features that make it a top choice for individuals and businesses looking to enhance their email communication experience. I have just installed and tried it out for some days.

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Bitcoin: A Decade of Disruption and the Promise of a Decentralized Future

Over the past decade, Bitcoin has emerged as a groundbreaking force, challenging traditional notions of currency and finance. Born out of the aftermath of the 2008 financial crisis, Bitcoin represents a decentralized and borderless form of digital currency that operates on a peer-to-peer network.

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The Transformative Power of Blockchain Technology

In recent years, blockchain technology has emerged as a revolutionary force with the potential to reshape industries, streamline processes, and enhance security. Originally developed as the underlying technology for cryptocurrencies like Bitcoin, blockchain has evolved far beyond its initial application. Today, it stands as a cornerstone for innovation across various sectors, offering transparency, security, and efficiency.

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The Vigenère Cipher

In the realm of cryptography, the Vigenère cipher stands as a testament to the ingenuity and complexity of early encryption methods. I have to admit that it is my personal favorite of the “old” ciphers. The Vigenère cipher, often attributed to Blaise de Vigenère, was actually first described by Giovan Battista Bellaso in 1553. Bellaso’s description of a polyalphabetic substitution cipher, which later became known as the Vigenère cipher, predated de Vigenère’s work by over a century. De Vigenère’s contribution was the development of a text autokey cipher, which was misattributed to him due to his association with the Vigenère cipher. The Vigenère cipher itself was not invented by de Vigenère but rather by Bellaso and later misattributed to him.

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A Beginner’s Guide to Ciphers, Cryptography, and Encryption

The use of secret codes and ciphers dates back to ancient civilizations, where rulers, generals, and diplomats employed various techniques to encode their messages. The Spartans, for example, used a device called the scytale, a rod of a particular diameter around which a strip of parchment was wound to reveal the hidden message. As societies progressed, so did the sophistication of these methods, leading to the birth of classical ciphers and, eventually, modern cryptographic techniques.

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PicoCTF: “where are the robots” [CTF Write Up]

Have you ever thought about joining the forces of white hat hackers and penetration testers? Don’t you know where to start or how to practice some skills? Though capture the flag games, or CTFs in short, are not the most life-like situations, they can help you to build a way of thinking and to learn the basic tools. PicoCTF is a great site to start as a beginner.

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Tor Hidden Services: Reaching The First Entry Point

You learned about the hidden part of the internet, the Tor hidden services. Then you downloaded and configured your Tor browser for the first deep dive into this unknown territory. As I mentioned before, the hidden services is a region of the internet that is not crawled and indexed by ordinary search engines like Google and Bing. You have to know the .onion URL of the site that you are looking for. These URLs are not the usual easy-to-remember domain names you see in the clear web. The hidden services URLs are generated text with the .onion ending. Luckily there are popular link collections and wiki sites as your entry points to the hidden services.

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