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# [Pro Only] Encryption support

Synk can encrypt files as they are copied to the destination. This ensures that only those who know the password can access the data stored in the files, and is useful in cases where your backup destination is untrusted or insecure.

To enable encryption for files copied to a particular base directory of your synchronization/backup, click the small "lock" icon in the lower left of the source definition detail area. You can click the icon again to disable encryption for this folder.

To use Synk's encryption support, you must also specify the password with which you wish the files to be encrypted.

The encrypted files are stored with an extension of .synkencrypted. You can decrypt an encrypted file by dropping it onto the Synk icon. You will be prompted for the password to the file, and after entering the correct password, the file will be decrypted to its original name in usable form.

Do not forget the password to your files. Synk uses commercial-strength AES encryption, and you will not be able to recover your files without your password.

You cannot boot from an encrypted copy of the operating system as the files are not directly readable. In general, you should limit your use of encryption to sensitive data only, as it significantly slows down the copying process.

## See also

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