Bip39 List Or for pretty high security, you might "roll your own private" seed phrase with dice or possibly a calculator as offline methods. Any person else who discovers the phrase can steal the bitcoins. It have to be retained magic formula, as an example it must not be typed https://bookmarkpagerank.com/story18543724/seed-phrase-generator-with-balance-free-github-the-basic-principles-of-seed-phrase-generator