What is SHA-256 Video Integrity in Dashcams
SHA-256 video integrity is a cryptographic fingerprint written to each dashcam clip that proves the footage has not been edited or tampered with after recording. Hawk applies SHA-256 hashing to every video segment, creating a mathematical proof you can submit to insurance, police, or court.
Why Video Integrity Matters in Evidence
When you submit dashcam footage to an insurance claim or dispute, the other party may argue the video has been edited or that key frames were removed. A tamper-proof hash solves this problem. Hawk: Dashcam & Drive Recorder writes a unique SHA-256 hash to every clip at the moment of recording, creating an unforgeable seal. If a single frame is altered after that moment, the hash becomes invalid. This is why courts and insurers recognise integrity-hashed video as stronger evidence than raw files. The hash proves your footage is original and untouched.
How Hawk's SHA-256 Hashing Works
SHA-256 (Secure Hash Algorithm 256-bit) is the same cryptographic standard used by banks and government agencies. When Hawk records a clip, it calculates a unique 64-character code (the hash) that mathematically represents that exact video file. Store the video anywhere, share it anywhere, and the hash remains the same. If anyone edits the file even slightly - crops a frame, adjusts brightness, trims audio - the hash will no longer match. Hawk includes the SHA-256 hash and a manifest file in its one-tap dispute export, so when you send the ZIP to your insurer or solicitor, they can independently verify the video is authentic.
Evidence Locker Protects Your Hashes
Recording with SHA-256 hashes is only useful if nobody can claim you altered the file after the fact. Hawk's Evidence Locker uses biometric lock (fingerprint or face recognition) to seal videos the instant they're flagged as important. Once locked, the video and its hash cannot be deleted or modified without biometric unlock, creating a chain of custody that survives legal scrutiny. The locker is fail-closed, meaning a device restart or app crash does not unlock the evidence. For Hawk Pro users, locked clips also sync to your own iCloud account, so even if your phone is lost or stolen, your evidence remains secure and hashable.
Exporting Integrity-Verified Evidence
When a crash or disputed incident happens, Hawk's one-tap dispute export creates a ZIP file containing every flagged video clip plus a manifest document listing every SHA-256 hash. This ZIP is designed to be submitted directly to your insurance company, the police, or a small-claims court. The manifest acts as a certificate of authenticity. Because the hash is calculated at the moment of recording and stored independently of the video file, it proves the footage existed exactly as it appears, unchanged, from the moment of impact.
Who Needs SHA-256 Dashcam Hashing
Daily commuters benefit from SHA-256 integrity when facing fault disputes or hit-and-run claims. Rideshare drivers (Uber, Lyft, Bolt) use Hawk's cabin-camera variant to protect themselves against false passenger complaints or assault allegations, with shift mode for multi-trip sessions. New drivers often lack the confidence to stand up in an insurance negotiation, and a hash-verified video transcript eliminates he-said-she-said arguments. Anyone driving in high-traffic areas or dispute-prone routes gains peace of mind knowing their evidence is mathematically tamper-proof before they even need it.
Getting Started with Hawk's Integrity Features
Hawk is free to download on iOS and Android. The free tier records 10 clips per month with 7-day retention and no subscription required. SHA-256 hashing is included in the free tier. To unlock continuous recording, GPS overlay, Evidence Locker, and iCloud sync, upgrade to Hawk Local Pro (£3.99/month, £39.99/year, or £49.99 lifetime). Rideshare drivers can add cabin camera and shift mode with Rideshare Pro (£8.99/month or £69.99/year). Every clip, every tier, gets the same cryptographic integrity seal.
Start recording with court-ready SHA-256 integrity in seconds.
Frequently asked questions
Can SHA-256 hashing be faked or spoofed?
No. SHA-256 is a one-way function; you cannot reverse-engineer a video from its hash. If someone modifies the video by even one pixel, the hash will not match. This is why courts accept it as proof of originality.
Does Hawk upload my videos to MRVL servers?
No. Hawk records locally to your phone storage. Pro users can opt to sync locked clips to their own iCloud account, but videos are not uploaded to MRVL servers. You control where your evidence lives.
What if I want to trim or edit a clip after recording?
Once a clip is recorded and hashed, editing it will invalidate the SHA-256 hash. For evidence purposes, you should export the clip with its original hash intact via the dispute export ZIP. If you edit a clip, the hash proof is lost.
Can I use Hawk's SHA-256 export in small-claims court?
Yes. The manifest file included in Hawk's dispute export ZIP contains the SHA-256 hashes and timestamps for every clip, making the evidence admissible in small-claims and civil proceedings. Courts recognise cryptographic integrity as proof of originality.
Do I need Hawk Pro for SHA-256 hashing?
No. Every Hawk tier, including the free version, writes SHA-256 hashes to every clip. Pro unlocks continuous recording, Evidence Locker biometric lock, and iCloud sync for locked clips.
How long does the SHA-256 hash stay valid?
The hash remains valid as long as the video file is unchanged. Store it for years, and it will still prove the video is authentic. Hash validity does not expire.