Tag: blockchain security

22 Feb

Why Bitcoin Uses SHA-256 Hashing Algorithm

Posted by Steve Messa

02/22/2026

8 Comments

Bitcoin uses SHA-256 because it's the most secure, battle-tested hash function available. It powers mining, prevents tampering, and has never been broken-despite over $1.2 trillion in value relying on it.

1 Jan

Double-Spending Attack Methods in Blockchain Networks

Posted by Steve Messa

01/ 1/2026

24 Comments

Double-spending attacks let criminals spend the same digital coin twice. Learn how race attacks, Finney attacks, and 51% attacks work-and how to protect yourself from them on Bitcoin and other blockchains.

Tag: blockchain security

Why Bitcoin Uses SHA-256 Hashing Algorithm

Double-Spending Attack Methods in Blockchain Networks

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