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ch05: Don't use web pages to generate mnemonics

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Due to the recent controversy regarding bitcoinpaperwallet.com,
recommending we don't even point people to places where they can use
webpages to generate private keys and/or mnemonics.
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Will Binns 2021-03-11 08:35:40 +01:00
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@ -293,14 +293,6 @@ https://github.com/bitcoinjs/bip39[bitcoinjs/bip39]:: An implementation of BIP-3
https://github.com/libbitcoin/libbitcoin/blob/master/src/wallet/mnemonic.cpp[libbitcoin/mnemonic]:: An implementation of BIP-39, as part of the popular Libbitcoin framework, in pass:[<span class="keep-together">C++</span>]
There is also a BIP-39 generator implemented in a standalone webpage, which is extremely useful for testing and experimentation. <<a_bip39_generator_as_a_standalone_web_page>> shows a standalone web page that generates mnemonics, seeds, and extended private keys.
[[a_bip39_generator_as_a_standalone_web_page]]
.A BIP-39 generator as a standalone web page
image::images/mbc2_0508.png["BIP-39 generator web-page"]
((("", startref="mnemonic05")))((("", startref="BIP3905")))The page (https://iancoleman.io/bip39/) can be used offline in a browser, or accessed online.
==== Creating an HD Wallet from the Seed
((("wallets", "technology of", "creating HD wallets from root seed")))((("root seeds")))((("hierarchical deterministic (HD) wallets")))HD wallets are created from a single _root seed_, which is a 128-, 256-, or 512-bit random number. Most commonly, this seed is generated from a _mnemonic_ as detailed in the previous section.

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