How does EnCase verify the contents of an evidence file with default settings?

EnCase verifies the contents of an evidence file using default settings by writing a CRC (Cyclic Redundancy Check) value for every 64 sectors copied. This process allows EnCase to provide a mechanism for integrity verification during the evidence acquisition process. CRC helps in detecting accidental changes to raw data by creating a unique value based on the contents of the sectors being copied. By checking these states against the CRC values created, EnCase can ascertain whether the data remains unchanged and therefore verify the integrity and authenticity of the evidence collected during a forensic investigation.

This specific approach ensures that any corruption or alteration of the data during acquisition can potentially be identified, thus reinforcing the validity of the digital evidence. The other options focusing on MD5 or SHA-1 hashes are related to cryptographic hashing methods that EnCase can employ, but under the default settings, CRC is specifically applicable in conjunction with the 64-sector copy setting for data verification.