BIP49 is not a widely recognized standard for direct mnemonic-to-private-key conversion. BIP39 is often referred to as a widely adopted Bitcoin Improvement Proposal for generating private keys from mnemonics. However, based on the conversion logic of BIP39, we can summarize the general process of converting mnemonics to private keys under BIP49 (if it does refer to some similar mnemonic conversion standard) or similar standards.
General process of converting BIP39 mnemonics to private keys
1. Normalization encoding:
The mnemonic and (optional) salt (usually "mnemonic" plus the user's password) are normalized and processed using NFKD (Normalization Form KD).
2. Using the PBKDF2 algorithm:
Using the PBKDF2 (Password-Based Key Derivation Function 2) algorithm, combined with the HMAC-SHA512 hash algorithm, the normalized encoded data is iterated 2048 times to generate a 512-bit seed.
3. Extract the private key:
From this 512-bit seed, the first 256 bits are the private key. The last 256 bits are usually used for other purposes, such as deriving other keys or for BIP32 hierarchical deterministic wallets, but are usually not needed in scenarios where they are directly converted to private keys.
Notes
Security: Both mnemonics and private keys are critical security elements in cryptocurrency wallets. Private keys must be kept absolutely confidential because anyone who has them has full control over the corresponding wallet and the cryptocurrency in it.
Backup: Mnemonics provide greater convenience and security as a form that is easier to remember and back up. Therefore, it is recommended that users back up both mnemonics and private keys (if possible).
Tool use: When using tools to convert mnemonics to private keys, ensure the security of the tools and avoid using tools that may send data to the backend to prevent private key leaks. It is recommended to use open source and verified tools, such as Ian Coleman's BIP39 tool (https://onekey.bip39.top/default.html).
Conclusion
Although BIP49 is not a standard for mnemonic to private key conversion directly, the conversion logic based on BIP39 can provide a rough reference. It is important to ensure that security best practices are followed during the conversion process to protect users' private keys and cryptocurrency assets.
Mnemonic to private key
General process of converting BIP39 mnemonics to private keys
1. Normalization encoding:
The mnemonic and (optional) salt (usually "mnemonic" plus the user's password) are normalized and processed using NFKD (Normalization Form KD).
2. Using the PBKDF2 algorithm:
Using the PBKDF2 (Password-Based Key Derivation Function 2) algorithm, combined with the HMAC-SHA512 hash algorithm, the normalized encoded data is iterated 2048 times to generate a 512-bit seed.
3. Extract the private key:
From this 512-bit seed, the first 256 bits are the private key. The last 256 bits are usually used for other purposes, such as deriving other keys or for BIP32 hierarchical deterministic wallets, but are usually not needed in scenarios where they are directly converted to private keys.
Notes
Security: Both mnemonics and private keys are critical security elements in cryptocurrency wallets. Private keys must be kept absolutely confidential because anyone who has them has full control over the corresponding wallet and the cryptocurrency in it.
Backup: Mnemonics provide greater convenience and security as a form that is easier to remember and back up. Therefore, it is recommended that users back up both mnemonics and private keys (if possible).
Tool use: When using tools to convert mnemonics to private keys, ensure the security of the tools and avoid using tools that may send data to the backend to prevent private key leaks. It is recommended to use open source and verified tools, such as Ian Coleman's BIP39 tool (https://onekey.bip39.top/default.html).
Conclusion
Although BIP49 is not a standard for mnemonic to private key conversion directly, the conversion logic based on BIP39 can provide a rough reference. It is important to ensure that security best practices are followed during the conversion process to protect users' private keys and cryptocurrency assets.
Mnemonic to private key
