https://web.archive.org/web/20151208231656/http://gse-compl…
https://web.archive.org/web/20151208231656/http://gse-compliance.blogspot.com/2010/02/modelling-risk.html
A year after the release of Bitcoin, Craig explains that security can be quantified. He uses probability theory and math to explain how to do this.
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He literally states here:”Security is a trade off. It is an economic function. There is no such thing as perfect security.” Now read the below article!
https://craigwright.net/blog/bitcoin-blockchain-tech/economic-security/