Harsh Maurya is a technology enthusiast currently working with a major investment bank as a senior technical manager. He has contributed numerous open source and free tools to the public. In his spare time, he also likes to spread awareness about network security and is the author of the book - How not to get hacked.
Table of contents How Bitcoin Came to Be A. Who Invented Bitcoin? B. The Problem with Traditional Currency C. Bitcoin Solves the Problems of Centralized Currencies The Bitcoin Protocol A. Bitcoin Authenticates the User with a Digital Signature B. How Bitcoin Stores Information C. How Transactions are Carried Out D. How Blocks are Validated E. How Proof-of-Work Prevents Double Spending How to Use...
Encryption is used nowadays on even the simplest of apps. Since it’s so simple to hack your information online, encryption and other types of cryptography are the best tools available to protect your information. Most applications and programs use some sort of encryption. The best VPNs use AES with 256 bit-keys, which is one of...
Today we will look at ways of mining Ethereum – an open-source blockchain based distributed system for decentralized applications. Although similar to Bitcoin, it’s different in a number of ways that we’ll discuss here. Let’s get started. What is Ethereum and how is it different from Bitcoin? In simple terms, Ethereum is to applications (apps)...
What is KRACK? KRACK is an acronym for Key Reinstallation Attack. The breach was discovered by Mathy Vanhoef, a postdoctoral researcher at the Catholic University of Leuven in Belgium. It is a very clever attack targeting the WPA2 protocol, which is the latest standard, and is considered to be very secure. KRACK targets a vulnerability...
There’s a lot of talk about ransomware in the news these days. It’s surprising how few people know what it means and what happens if you get attacked. Here’s a rundown on the measures you can take to protect yourself and what to do if the worst happens. What is Ransomware? Ransomware is a category...
Before someone decides which VPN provider to choose, the first question that comes to mind is whether or not VPNs are legal. It is a very common question that people ask in online forums, and – given the implications of breaking a law – it is a good idea to understand it completely. The answer...
Whenever we talk about blockchain, immutability is the next thing that comes up. There are different views on the topic, but when it comes down to it, everyone is looking for an answer to a single question – are blockchain and Bitcoin immutable? The short answer is – Yes, blockchains and Bitcoins cannot be changed....
You might think that by using a popular and leading VPN solution you ensure that your IP address and online activities remain concealed. Unfortunately, even the priciest and most sophisticated VPN won’t protect you from IP leaks originating in your browser or operating system. To verify that your information and identity are indeed safely concealed,...
