🧭 Technical Principles｜Hash Functions
· What it is: SHA-256 always outputs 256 bits, which is 64 characters when written in hexadecimal.
· How it works: Hashing is not encryption: encrypted data can be restored using a key, but hashing is one-way, so the original content cannot be recovered from the hash.
· Note: Don’t confuse a transaction hash with a private key: transaction hashes can be public, but private keys and recovery phrases must never be shared.
$BTC 77268.1（-4.9%）
· What it is: SHA-256 always outputs 256 bits, which is 64 characters when written in hexadecimal.
· How it works: Hashing is not encryption: encrypted data can be restored using a key, but hashing is one-way, so the original content cannot be recovered from the hash.
· Note: Don’t confuse a transaction hash with a private key: transaction hashes can be public, but private keys and recovery phrases must never be shared.
$BTC 77268.1（-4.9%）