<p>Seed phrases usually include a <a href="https://en.wikipedia.org/wiki/Checksum" rel="nofollow noreferrer">checksum</a>. For example, a 12-word <a href="https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki" rel="nofollow noreferrer">BIP39</a> seed phrase has 4 checksum bits, which means only about 1 in 16 randomly typed seed phrases will be considered valid.</p>

CC BY-SA 4.0
2022-06-26T14:36:41.027Z
2022-06-26T14:36:41.027Z
Vojtěch Strnad
<p>When I tried login using a random mnemonic phrase the wallet shows incorrect word? How does the wallet know that it is not previously generated?</p>

<bitcoin-wallet-app>
How does the wallet know that this seed phrase is generated before?
Athul A
# How does the wallet know that this seed phrase is generated before?

(Asked by: username_0 on 2022-06-26)

When I tried login using a random mnemonic phrase the wallet shows incorrect word? How does the wallet know that it is not previously generated?

**Tags:** bitcoin-wallet-app


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## 1 answers

### Answer by username_1 on 2022-06-26. Score: 2

Seed phrases usually include a [checksum](https://en.wikipedia.org/wiki/Checksum). For example, a 12-word [BIP39](https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki) seed phrase has 4 checksum bits, which means only about 1 in 16 randomly typed seed phrases will be considered valid.


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