How to create a strong passphrase?

To create a strong passphrase, follow these guidelines:

1. Use a combination of upper and lower case letters, numbers, and special characters.
2. Make the passphrase at least 12 characters long. Longer passphrases are generally more secure.
3. Avoid using common phrases or words that can be found in a dictionary.
4. Don't use personal information such as your name, address, or date of birth in your passphrase.
5. Don't reuse passphrases for different accounts.
6. Consider using a passphrase generator to create a random and unique passphrase.

It's also a good idea to periodically change your passphrases to keep them secure.