Perform digital forensic file analysis: calculate Shannon entropy curves, compute simultaneous file hashes, and evaluate PRNG randomness without server uploads.
Hashes serve as digital fingerprints. By calculating and logging a file's SHA-256 hash at the time of seizure, investigators can prove in court that evidence was not modified or tampered with during analysis.
Normal files (executables, plaintext, images) have characteristic entropy values (between 3.0 and 6.5). Truly encrypted or compressed payloads produce near-maximum entropy (~7.9 to 8.0) because every byte value appears with equal probability.