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Denial-of-Service Attack
Researchers Expose Flaw in Bitcoin Wallets That Could Be Exploited for Double-Spending
A standard way to transact bitcoin could be misused to enable a kind of double-spending, new research has found.

Zcash Releases Software Fix After Denial-of-Service Bug Discovery
The development team behind the zcash project has released a new software update following the discovery of a denial-of-service vulnerability.

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