- MASTER KEY CRYPTOCURRENCY CODE
- MASTER KEY CRYPTOCURRENCY PASSWORD
There are a couple of possible approaches:
Create and save the Master Key material. To replace the Master Key, you decrypt the Data Encryption Key using the old Master Key, generate a new Master Key, then encrypt the Data Encryption Key (without changing it) with the new Master Key and save the encrypted result. The Data Encryption Key is then used to generate any needed passphrases or cryptography keys, which are used to protect credentials, private keys, or other secret encryption keys. The Master Key (loaded and stored via our KeyStore implementations) is used to securely encrypt the Data Encryption Key in a file (this way you have complete understanding and control of the encryption of this important key). We recommend this two-tier approach so that the Master Key can easily be backed up, restored, and replaced in case of a breach, without needing to touch any other encrypted data. These store one or more SecretKey, which you then can use to securely encrypt a Data Encryption Key, which in turn protects all other credentials, keys, and certificates. To make the storage and retrieval of a Master Key simpler, we have provided a couple of implementations of the standard Java KeyStore class. If you do this, do not forget to also create a means whereby the system can be restarted from the master key if there is some sort of equipment failure. Note that depending on the method by which you gather machine-specific data to create a master key, you may need to create a method whereby the master key can be recorded and placed in a safe place immediately after installation. It would be re-generated at each system startup from the fixed multiple data sources, some random, some machine-specific. Best practices would NOT store this master key anywhere. At least one of these sources may be tied to the hardware on which the system is running. Master keys should be generated using a key stretching algorithm like HKDF from data gathered from multiple sources. This is often termed the 'master key' because it is used to secure all other cryptographic keys and passwords. These random keys and passphrases should be generated dynamically at installation time, and they should, themselves, be protected by a randomly generated key. Keys and certificates should be stored in a key store, protected by a long random passphrase or encrypted by a strong randomly generated encryption key. Obfuscating or encoding the data alone (by XORing with some static byte array, or Base64 encoding, for example) is not enough. If these must be stored, they must be encrypted. MASTER KEY CRYPTOCURRENCY CODE
Keys and credentials should not be stored in clear text in any configuration files or source code files. Customers can easily forget or neglect to change them.
MASTER KEY CRYPTOCURRENCY PASSWORD
Either ask the installer to specify a password (for example, for an admin account password), or generate them dynamically (keystore passwords, cryptography keys, master key, etc.). Keys, certs, and passwords should be established at installation time (first bootup for appliances). Otherwise, every legitimate customer will have access to certificates/keys that allow her to spy on all other customers. If multiple customers can share the same appliance or server, each must have a unique set of keys and certificates. The guidance given here deals primarily with credentials rather than with ordinary user login passwords.Ĭryptographic keys (including TLS certificates) and passwords should be unique for each appliance instance and for each on-premises installation. Key Encryption Key (KEK) or "Master Key" The top-level cryptographic key used to protect a Data Encryption Key These secrets may be anything, including cryptographic keys. Data Encryption Key (DEK) A cryptographic key used to encrypt secrets. credentials A username and password pair used by a system to access other resources.
Sample code for generating and managing application master keys Guidanceįirst, a few definitions: login passwords A password or passphrase used by a human to access a front-end system. Guidance for generating and managing application Master KeysĬustom KeyStore implementations for Master Keys This repository provides an inexpensive means to protect cryptographic master keys (key encryption keys, KEKs) in a way that is resistant to some of the most common remote file exfiltration attacks.
FYI, this library has been migrated into an OWASP Project and will from now on be maintained there
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