In our open-esignforms project we use a layered approach for keys in which we have a boot key for the application that requires dual passwords which we then combine into a single password for PBE encryption of the boot key. We then have session keys that are encrypted with the boot key, and the session keys are used to encrypt one-up keys for encrypted blobs.

In your case, you could encrypt your key using PBE assuming you have a way to provide the password to unlock it. This would allow you to protect the key with a password, which is the most basic way to go if you don't have a keystore to use.

David

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