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.

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...
James Ellis: The British cryptographer who invented public key cryptography before Diffie-Hellman (and kept quiet about it) by @Cryptobill
When you think of heroic British spies, the image of a math guy in heavy frame glasses working behind a desk piled with math books surely is not what comes to mind. Hidden Heroes ...
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...
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...
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 ...
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? Yo...
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...
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...