Detect Edited Photos with a SHA-256 Fingerprint
SHA-256 in plain language: what a match proves, what a mismatch means, why photos sent via Zalo or Messenger never match, how to compare files.
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Know-how for field teams
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Trusted Time vs Phone Time: How Photo Timestamps Get Faked
How photo timestamps get faked (phone clock, EXIF edits, re-stamping) and how server-synced time plus a monotonic clock helps, with honest limits.
QR Photo Verification: How Recipients Check a Photo
How QR photo verification works for recipients: what the page shows, why the area is rounded, what integrity flags mean and how to compare files.
Offline Photo Proof: Capturing Evidence With No Signal
Take photo proof in basements and remote sites with no signal: how GPS, trusted time and the upload queue work offline, plus a field team checklist.
Phone GPS Accuracy Explained: How Many Metres Off?
Phone GPS accuracy depends on satellites, A-GPS, Wi-Fi and buildings. Learn what the ±m radius means and how to get a reliable fix for work photos.
Are Timestamped Photos Valid Evidence in Vietnam?
Can timestamped photos be used as evidence in Vietnam? Electronic data under Vietnamese law, what boosts credibility, vi bang records, and app limits.
Insurance Claim Photos: How to Document Damage Right
How to take insurance claim photos for vehicle, property and goods damage: what adjusters look for, keeping originals, and when to shoot.
Rental Property Condition Photos: Move-In and Move-Out
A room-by-room shot list for rental property condition photos, plus meter readings, sharing tips and mistakes that cost tenants and landlords deposits.
Before/After Photos for Field Service Technicians
A before/after photo checklist for AC, electrical and telecom technicians: readable serial plates, warranty claim evidence and fewer customer disputes.