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Can a booming “crypto-currency” really compete with conventional cash?
A proposed “proof” is probably a bust–but even failed attempts can advance computer science.
Currencies designed to fix perceived flaws in Bitcoin could lead to competition that makes the idea of digital “cryptocurrency” stick.
New details of the NSA’s capabilities suggest encryption can still be trusted. But more effort is needed to fix problems with how it is used.
The first major conference for the digital currency suggests it is gaining legitimacy, but in a manner disappointing to some early enthusiasts.
The processors in smart phones and tablets leak radio signals that betray the encryption keys used to protect sensitive data.
As other countries have discovered, businesses need encrypted communications.
New hardware should make it possible for all online data to be as secure as a credit card transaction.
An alleged robbery suggests Bitcoin—an anonymous, decentralized currency—may need bank-like institutions after all.