By contrast, if "built-in" encryption methods mean properly configuring automatic encryption that comes included...
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with the mobile device itself, it will tend to minimise human error in most cases. However, it should be noted that there are few true "built-in" encryption products: really only Microsoft BitLocker on newer Windows-based computers and some self-encrypting hard drives and USB sticks. Yet implementing full disk encryption with boot-time authentication on a laptop, for example, will offer good security with minimal user intervention. Hard disks and USB drives with built-in encryption also combine security with ease of use, which is a winning combination.
It's not about the quality of the encryption algorithm (assuming you are using a well-proven product) but about user education and authentication. Good quality passphrases (or two-factor authentication) coupled with a proven encryption product will offer the best possible data protection outcome.
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