Ken Shirriff's blog

Computer history, restoring vintage computers, IC reverse engineering, and whatever

Hidden surprises in the Bitcoin blockchain and how they are stored: Nelson Mandela, Wikileaks, photos, and Python software

Every Bitcoin transaction is stored in the distributed database known as the Bitcoin blockchain. However, people have found ways to hack ...

The Bitcoin malleability attack graphed hour by hour

I have a new Bitcoin article: Hidden surprises in the Bitcoin blockchain The Bitcoin network was subject to a strange attack this week. U...

Bitcoin transaction malleability: looking at the bytes

"Malleability" of Bitcoin transactions has recently become a major issue. This article looks at how transactions are modified, a...

Bitcoins the hard way: Using the raw Bitcoin protocol

All the recent media attention on Bitcoin inspired me to learn how Bitcoin really works, right down to the bytes flowing through the netwo...

How Hacker News ranking really works: scoring, controversy, and penalties

The basic formula for Hacker News ranking has been known for years , but questions remained. Does the published code give the real algorithm...

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