New Powerful Attacks On ECDSA In Bitcoin Systems

There is a wave of new powerful cryptographic attacks on bitcoin systems. There are several types of attacks: Attacks which use poor random number events. It has already happened hundreds of times in the bitcoin blockchain since 2012. Now there is a recent massive outbreak of such events. Here is a recent example from 1 Nov …

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How to Lose Your Bitcoins with Bitcoin Core Client

The answer is: just accept to receive a regular payment with bitcoin core client v0.9.2.1. All your bitcoins may be lost!  Here are the facts. Today we have done  the following experience. I had my client synchronized and running on my laptop, then suddenly it hanged and I had to reboot it. Just few minutes before …

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Most Unix/Linux/Mac Computer Systems Open For Hackers

A critical vulnerability allows remote attackers to execute code on our computers. Immediate patching of everything is recommended. Some points: As bad as Heartbleed, some people say it is worse: severity 10/10. Existed for 22 years since 1992. Not only Unix Linux, MacOS etc. but also Windows. Yes, I have checked with my Cygwin installation …

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Bitcoin Security and Cryptography: Reasons to Worry

Bitcoin has a toxic culture of NOT taking security and cryptography questions seriously ever. Being able to withstand expert criticism, champion best practices and anticipate the risks is crucial for any open source project. Unhappily we observe that: There isn’t a single academic or scientist at the bitcoin foundation and they don’t like being criticized on …

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