Passwords

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… prevent unauthorized access to personal data and account information.
… are only secure if they are handled securely.
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Choose secure passwords.
Use different passwords for different services.
Keep passwords safe by encrypting them or storing them in a secure password manager.
Change your passwords if they fall into the hands of third parties.
Secure Passwords | BSI
Many people have difficulty choosing the right passwords, often using the same one for several programs. This increases the risk of IT security vulnerabilities because weak passwords often cause problems. This animated film reviews the guidelines for creating secure passwords.
Source: BSI