Cryptography

Cryptography is the cornerstone of cryptocurrencies. Bitcoin was made possible by well known cryptographic mechanisms that were assembled by Satoshi Nakamoto in a very creative way.

Although cryptography has been in use for thousands of years, only now has it become a household name due to the popular exposure brought by cryptocurrencies.

Although the subject of highly technical mathematical studies, here we approach crypto from the end user’s perspective, using accessible language and easy to understand concepts.

IOTA hash collisions could have wrecked the network if it were fully decentralized by @Cryptobill
Professor Matthew Green of Johns Hopkins University posted an interesting, if not troubling, tweet about IOTA's security: The use of a broken hash function would have been a cri...
What is a “paper wallet”? Doesn’t sound very high tech! by @Cryptobill
Five steps to make paper in ancient China Printing secrets on paper doesn't sound high tech, but it's one ...
Understand Multisignature Systems by @Cryptobill
A Bitcoin is simply a signed transaction on the blockchain. When you say you own X Bitcoins, it means one or more transactions were signed, using private keys, attributing a certai...
Understand asymmetric AKA public key cryptography by @Cryptobill
For thousands of years the art of encryption consisted in hiding one secret from the enemy. By gaining access to this secret the opponent could decode the message and, perhaps, fut...
Decentralized blockchains can only survive with a valuable token, like Bitcoin, attached to them by @Cryptobill
We've heard this time and again, especially from folks in the financial sector: "blockchain is here to stay, Bitcoin not so much". Is this really so? We disagree, and in this ar...
The CryptoNight and CryptoNight Light PoW Algorithms by @Cryptobill
CryptoNight is a Proof-of-Work algorithm which aims to be CPU-mining friendly. CryptoNight Lite A lighter version of CryptoNight which uses memory cache pages half the size (1 MB...
ELI5 Sponge Functions for cryptocurrency development [Hash functions] by @Cryptobill
If you've been following the development of IOTA, and other cryptocurrencies, then you've probably heard the term "cryptographic sponge function", or simply sponge function? Y...
ELI5: Cryptocurrency master keys by @Cryptobill
A cryptocurrency master key is a theoretical concept where one specially crafted cryptographic private key would be able to decrypt ciphertext encrypted using any public key. As...
Is Quantum Key Distribution in the future of cryptocurrencies? by @Cryptobill
What would be the use of a data transmission system where the contents of a message changed if anyone simply read it? Secret Key Exchange Imagine if our two dearest cryptocurrenc...
ELI5 What is the Avalanche Protocol? [AVA] by @Cryptobill
Avalanche is a proposed consensus mechanism which aims to combine the best features of previously existing protocols. If you've tried to understand the Avalanche consensus proto...