From d630f26de6f48b54dbd8e2954e9a8369b3c6e05e Mon Sep 17 00:00:00 2001 From: krupawan5618 Date: Sun, 28 Mar 2021 14:35:09 -0400 Subject: [PATCH] A Tip Box that details sufficiency of 12 words Tip box regarding 12 words being sufficient entropy to the production of an HD wallet. --- ch05.asciidoc | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/ch05.asciidoc b/ch05.asciidoc index 465bab36..68e2aa55 100644 --- a/ch05.asciidoc +++ b/ch05.asciidoc @@ -259,6 +259,11 @@ luggage oxygen faint major edit measure invite love trap field dilemma oblige+ +5f1e0deaa082df8d487381379df848a6ad7e98798404+ |======= +[TIP] +==== +Many wallets do not allow for the creation of wallets with more than a 12 word pneumonic phrase. You will notice from the tables above that despite the unique amounts of entropy used, the seed remains the same length of 512 bits. From a security perspective, the amount of entropy actually used for the production of HD wallets is roughly 128 bits, which equals 12 words. Providing more than 12 words produces additional entropy which is unnecessary, and this _unused_ entropy is not used for the derivation of the seed in the way that one might intially suspect. From a usability perspective, 12 words is much easier to write down, back up, and store, so stick with 12 words! +==== + [[mnemonic_passphrase]] ===== Optional passphrase in BIP-39