Cryptocurrency Q&A How big is a public Bitcoin key?

How big is a public Bitcoin key?

Elena Elena Thu Feb 06 2025 | 6 answers 1639
I am wondering about the size of a public Bitcoin key. I know that Bitcoin keys are important for cryptocurrency transactions, but I am specifically curious about the length or size of a public Bitcoin key. How big is a public Bitcoin key?

6 answers

MysterylitRapture MysterylitRapture Sat Feb 08 2025
Compressed public keys are more compact, measuring exactly 33 bytes in length.

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amelia_jackson_environmentalist amelia_jackson_environmentalist Sat Feb 08 2025
These keys feature a specific prefix, which can be either 0x02 or 0x03, depending on certain cryptographic conditions.

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TaekwondoMaster TaekwondoMaster Sat Feb 08 2025
Following the prefix, a 256-bit integer known as 'x' is included, forming the remainder of the compressed key.

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BlockchainBaronessGuard BlockchainBaronessGuard Sat Feb 08 2025
In the realm of Bitcoin, public keys exist in two primary forms: compressed and uncompressed.

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BonsaiVitality BonsaiVitality Sat Feb 08 2025
On the other hand, uncompressed public keys are substantially larger, spanning 65 bytes.

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