Before you upload your ID to a crypto exchange, add a watermark that ties it to that one verification — so a leaked copy is worthless to anyone else.
Almost every crypto exchange now requires KYC: a photo of your passport or ID, and usually a selfie. You hand over a complete identity package — and you have no control over how each platform stores it, or how long it keeps it.
Exchanges and the third-party providers they use for verification have a track record of data breaches. When a crypto platform is compromised, leaked KYC records — passport scans, selfies, addresses — are especially dangerous, because they map a verified identity directly to crypto holdings.
That makes crypto users a favored target for account takeover, SIM-swapping and social-engineering attacks. A clean, unmarked passport scan circulating after a breach is a gift to an attacker.
Add a clear watermark naming the exchange and date — for example, “For [Exchange] KYC only — 2026-06-18.” The exchange can still verify everything it needs, but if that copy ever leaks, it's plainly bound to one context and far harder to reuse.
It shouldn't. A well-placed watermark keeps your photo and document details legible, so verification still works while the copy is protected against reuse. Keep the mark away from the photo and machine-readable zone.
Exchanges hold verified identities tied to financial holdings and have been frequent breach targets. A leaked, unmarked passport scan is highly valuable to attackers — watermarking limits how a leaked copy can be reused.
No. Everything runs in your browser. No file is uploaded, no account is needed, and nothing passes through our servers — there are none in the loop.
Yes. Kavrylo handles both images and PDFs, whatever the exchange's upload step expects.
Kavrylo is free, with no limits and no sign-up.
Free, private, entirely in your browser. No account, no upload.
Watermark my passport