> For the complete documentation index, see [llms.txt](https://ethans-place.gitbook.io/btc-cli-vault/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ethans-place.gitbook.io/btc-cli-vault/home.md). # Home
\[[Github](https://github.com/ethanzhrepo/btc-cli-vault)] \[[Twitter](https://x.com/0x99_Ethan)] \[[Download](https://github.com/ethanzhrepo/btc-cli-vault/releases)] How to back up your mnemonic phrase more securely? Write it on paper? Engrave it on steel? Scramble the order? Use a 25th word? Password cloud storage? Hardware wallet? * Physical backups can be lost or damaged * Cloud storage risks being hacked Security practice: Use AES and passphrase dual protection to back up across multiple cloud drives. Only need to remember two passwords - one to decrypt the 24 word mnemonic, and one to combine with the 24 words to restore the key. ### Important Security Note **All data files and credentials remain under your full control at all times.** This wallet puts you in complete control of your assets through self-custody: * Wallet files are encrypted with your passwords before being stored * Private keys are never shared with any third party * Cloud storage providers cannot access your unencrypted data * You are responsible for safely storing your wallet files and remembering your passwords * No recovery mechanisms exist if you lose your encrypted files or passwords Always keep multiple backups of your encrypted wallet files and ensure you never forget your passwords. ### Security Features * BIP39 mnemonic phrase generation (24 words) * Optional BIP39 passphrase support * AES-256-GCM encryption with Argon2id key derivation * Cloud storage support via OAuth (Google Drive, Dropbox, Box, AWS S3) * Local wallet storage option * **No server component** - all OAuth token exchanges, cloud storage connections, and authorization processes happen solely on your local machine without any external server involvement. This program is fully client-side and will never have any server component. ### Supported Address Types * Legacy addresses (P2PKH) * SegWit addresses (P2WPKH) * Nested SegWit addresses (P2SH-P2WPKH) * Taproot addresses (P2TR) ### Supported Networks * Bitcoin Mainnet * Bitcoin Testnet ### Storage Options * Local file system * Google Drive * Dropbox * Box * AWS S3 * Apple Keychain (macOS only)