The keys for the Blowfish encryption algorithm are typically stored in a secure manner to prevent unauthorized access. In practice, this often involves encrypting the keys themselves with another algorithm or storing them in a hardware security module (HSM) that provides secure key storage and cryptographic operations.
For example, in a web application using Blowfish for data encryption, the encryption key might be generated when the application starts and then securely stored in a configuration file that is only readable by the application process. Alternatively, the key could be stored in an HSM, which requires specific credentials to access the key.
In cloud environments, secure key storage is often provided by the cloud service provider. For instance, Tencent Cloud offers a Key Management Service (KMS) that allows you to securely create, store, and manage cryptographic keys for use in various services and applications, including encryption with algorithms like Blowfish.