How do I securely store encryption keys in java? [closed]

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Your problem is a common one. In linux, user passwords are stored in a plain text file. Although only the password hashes are stored, if an attacker gets access to that file, he will not take long to discover some password using an offline dictionary attack. In this case, the OS relies on file permissions to deny access to unauthorized users. In your case, it is not much different. You must configure the password file permissions properly and ensure the physical security of the server.

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