Which practice best preserves the authenticity of digital information over time?

• A. Relying on the initial copy without any transfers or logs.
• B. Editing metadata to reflect desired outcome.
• C. Maintaining a detailed chain-of-custody record documenting data collection, transfer, and storage.
• D. Storing data on personal devices.

Answer: (C)

Maintaining the authenticity of digital information over time hinges on an auditable chain of custody that records every step the data passes through—from how it was collected, to every transfer, to how and where it’s stored. This clear record lets you verify that the data has remained intact and unaltered since its creation. By tying each action to a specific person, time, and handling procedure, you create a defendable history that supports integrity and admissibility in investigations. In practice, this is strengthened by validating data with hashes or digital signatures and keeping it in controlled, forensically sound storage to prevent tampering.

Relying on the initial copy without logs provides no evidence that later transfers or copies were kept intact. Editing metadata to reflect a desired outcome is deceptive and does not establish authenticity. Storing data on personal devices introduces greater risk of loss or unauthorized access and breaks the necessary custody trail that would prove authenticity over time.