# Advanced Features ## Advanced Security Features 1. Multi-Signature (Multisig) Support Cardware Wallet includes multisig capabilities that require multiple private keys to authorize a transaction. This feature distributes signing authority across multiple parties or devices, lowering the risk of unauthorized access. Multisig is especially beneficial for institutional investors, collaborative funds, or joint account setups by providing enhanced control and security. 2. Hierarchical Deterministic (HD) Wallets The wallet supports BIP-32 compliant HD functionality, allowing users to generate an unlimited number of private keys from a single master seed. This tree-like key derivation not only streamlines wallet management but also enhances privacy by enabling a new address for each transaction without exposing the master key 3. Broad Cryptocurrency Compatibility Cardware Wallet is available in two product versions: * **BTC-Only Version:** Exclusively supports Bitcoin (BTC). * **BTC and EVM Version:** Supports Bitcoin alongside Ethereum (ETH & ERC-20 tokens) and any EVM-compatible blockchain. Both versions are optimized for secure, efficient transaction processing, ensuring reliable performance across supported networks. 4. QR Code-Based Transactions Transactions are securely managed via a QR code system. The Web Wallet generates a partially signed bitcoin transaction (PSBT), which is then scanned by the Cardware device to sign the transaction and display the signed transaction as QR codes. The Web Wallet then broadcasts these signed transactions to the network. This air-gapped approach keeps private keys isolated from network exposure, significantly reducing risks from malware or remote attacks. 5. Backup and Recovery Options The wallet implements robust backup and recovery features centered on a 24-word mnemonic seed phrase. This seed phrase is the root for all derived keys and is essential for restoring the wallet if needed. For added durability, a steel seed phrase sheet is provided to protect against environmental damage (fire, water, etc.). Additionally, the Cardware wallet supports restoring your private key upon setup. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.cardwarewallet.com/cardware-wallet-documentation/features/advanced-features.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.