From 18fb590d263777af8d5bf3413d628f79c8643220 Mon Sep 17 00:00:00 2001
From: openoms <43343391+openoms@users.noreply.github.com>
Date: Wed, 1 Apr 2020 19:21:17 +0100
Subject: [PATCH] backups: add Electrum Wallet seed as a passphrase

---
 backups/README.md | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/backups/README.md b/backups/README.md
index f7f492d..3d3cdac 100644
--- a/backups/README.md
+++ b/backups/README.md
@@ -7,4 +7,15 @@ Can be thought of as a physical 2-of-3 multisig solution.
 
 ## [ColdCard](coldcard.md)
 ## [JoinMarket](joinmarket.md)
-## [LND](lnd.md)
\ No newline at end of file
+## [LND](lnd.md)
+
+### 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).  
+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. 
+
+The [Electrum word list](https://github.com/spesmilo/electrum/blob/master/electrum/wordlist/english.txt) is based on the same 2048 words as the the [BIP39 word list](https://github.com/bitcoin/bips/blob/master/bip-0039/english.txt) which the ColdCard firmware contains so the keyboard entry is facilitated by the menu.
+
+An Electrum Wallet seed provides [135 bits of entropy](https://electrum.readthedocs.io/en/latest/seedphrase.html#security-implications) which is stronger than a [12 word BIP39 seed](https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki).