Final answer:
FTK Imager calculates MD5 and SHA1 hash values to verify data integrity.
Step-by-step explanation:
FTK Imager calculates MD5 and SHA1 hash values for the entire drives and images to verify the integrity of the data. MD5 and SHA1 are cryptographic hash functions that generate unique hash values based on the contents of the drive or image. By comparing these hash values with the original ones, FTK Imager can determine if any changes or corruption have occurred in the data. This process is commonly used in digital forensics to ensure the reliability and authenticity of acquired evidence.