Every One-Time Pad encrypted file requires its own equally sized unique key file which is why Auto Key is indispensable for multi-file encryption software. OTP Key Demands (click & hold).
One key encrypting multiple files (key re-usage) breaks the One-Time Pad rule making encrypted files vulnerable to exploits.
OTP Multi File Encryption can't be done without Auto Key creation.
FinalCrypt is the only Unbreakable One-Time Pad fully automatic File Encryption software publicly available.
One-Time Pad Encryption keys have the following requirements:
1. Key files have to be kept completely secret at all times
2. Key files are at least equal in size to the file it encrypts
3. Keys are created with a True Random Number Generator
4. Key files may never be re-used to encrypt other files
Following up on the above requirements One-Time Pad encrypted files are impossible to decode without their key files.
Governments also use advanced One-Time Pad Encryption.
Your Key Directory is used to automatically create and select your encryption keys during encryption and decryption.
When you start FinalCrypt the first thing you do is select your Key Directory on a detachable external (USB) drive.
Manual key creation & selection is supported but discouraged.
When encrypting files FinalCrypt automatically generates a new Key File in the selected Key Directory.
This new Key File is used to encrypt the correlating target file only once without reusage.
The Key File = Selected Key Directory + Encrypted File Full Path.
When decrypting files FinalCrypt automatically opens correlating key files from the selected Key Directory.
The encrypted file can be decrypted if key authentication was successful during scanning.
Decryption deletes correlating key files from the Key Directory.