Bip39 Checksum. Due to the cryptographic style and design of BIP-39, a weak passphrase doesn't reduce the safety of another wallets or aid expose the seed words. Sure, BIP39 passphrases are situation-sensitive. Ensure that you enter your passphrase just while you set it up, like any uppercase or lowercase letters. https://bookmark-share.com/story18702017/bip39-wallet-https-linktr-ee-bip39-the-single-best-strategy-to-use-for-bip39-wallets