Questions tagged [checksum]

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2
votes
1answer
355 views

What is the probability of different public key hash that produce the same checksum value

checksum = 1st4byte(sha256(sha256(PubKeyHash))) checksum1 = 1st4byte(sha256(sha256(PubKeyHash1))) What is the P(checksum == checksum1)? where PubKeyHash != PubKeyHash1 Is it 1/(2^^32)?
1
vote
1answer
43 views

How to calculate the checksum of an extended public key?

Very difficult to find definitive info on this. From what I can find on google and looking at BIP32 it seems like the process to calculate a checksum for an extended key is to decode the base58 ...
0
votes
1answer
45 views

Is the checksum used in BIP39 mnemonic sentences too short?

In the BIP39 specification, you add 1 bit of checksum for every 32 bits of entropy you generate. Therefore, with a common entropy size of 128 bits, you are only adding 4 bits of checksum. This means ...
0
votes
0answers
41 views

download bitcoin core safely: wrong checksum

I've downloaded the "classic" linux bitcoin core 0.19.1 (tgz) on https://bitcoincore.org/en/download/ In the SHA file that's on the website this is the key: ...
0
votes
1answer
67 views

are checksums included in mnemonic seed phrases?

say i have 24 words. Out of those 24 words, is the 24th one the checksum. say i have: a1 b2 c3 d4 e5 f6 g7 h8 i9 j10 k11 l12 m13 n14 o15 p16 q17 r18 s19 t20 u21 v22 w23 x24 is x24 the checksum? or ...
3
votes
2answers
1k views

Checksum vs. Hash: Differences and Similarities ?

What are similarities and differences between a "checksum" algorithm and a "hash" function? Can they be used instead of each other? Or their usage are different? For example, for verifying the ...
2
votes
1answer
1k views

How to validate bitcoin address

How I can validate a standard bitcoin address?
1
vote
1answer
80 views

Mastering Bitcoin: Where is the checksum coming from when running bx base58check-decode?

For example, if I run bx base58check-decode with the base58 encoded private key of Kxj5ejwPg2s2ejZHW7N1zAydD4fkmFi9j19QRmgeVK9mXL3wFMmp from this example, I get the following: { checksum ...
9
votes
2answers
8k views

How do I check the checksum of a Bitcoin address?

I'm working on a Bitcoin ATM. We want to detect addresses that are entered incorrectly. There's a checksum on Bitcoin addresses - but how can we check it?