Bip39 Length Or for very substantial security, you could potentially "roll your personal" seed phrase with dice or simply a calculator as offline approaches. You should not share: Hardly ever share your seed phrase with any individual. The phrase equates on your private keys and should be kept confidential constantly. https://thebookpage.com/story3987500/bip39-bitcoin-core-little-known-facts-about-bip39-word-list