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backups: update readme

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backups/README.md
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# Single seed multi-location backup schemes
The aim here is to create 3 packages of cryptographycally secure
The aim is to create 3 packages of cryptographycally secure
backups where the funds cannot be recovered from any single package,
but can be recovered with the combination of any two.
Can be thought of as a physical 2-of-3 multisig solution.
@@ -11,7 +11,7 @@ Can be thought of as a physical 2-of-3 multisig solution.
### Electrum Wallet seed as a passphrase
A well proven way to generate a random 12 word is to create a new wallet seed in the [Electrum Wallet](https://electrum.org/#download).
A well proven way to generate a random 12 word is to create a new wallet seed in [Electrum Wallet](https://electrum.org/#download).
To use Electrum boot [Tails](https://tails.boum.org/) (ideally offline) or [download and verify the wallet](https://electrum.org/#download) on an existing system.
Follow steps 1-5 in this [guide](https://bitcoinelectrum.com/creating-an-electrum-wallet/) to get the seed. The wallet file is not needed, only write down the words and store accordingly as the 12 words are to be used as a passphrase, encryption passphrase, cypher phrase or wallet unlock password. Do not reuse passphrases for more than one purpose and label the backups clearly.