Why borders are different
Most legal systems treat the border as an exceptional zone: the state’s interest in controlling what enters is weighed differently than in domestic policing, and device searches often need less justification or none at all. Some countries publish thresholds ("reasonable suspicion" tiers for basic vs forensic searches); others leave it to officer discretion.
The practical consequence: the protections you assume from ordinary life may simply not apply for the minutes your phone spends at a checkpoint.
What a search actually sees
A basic inspection is a person navigating your unlocked phone: photos including the Hidden album, messages, email, notes, installed apps, and any cloud service that is logged in. A deeper (forensic) search can involve connecting the device to extraction tooling, with capabilities that vary by device, OS version and vendor.
Two things follow. First, "hidden from browsing" tricks — the Hidden album, renamed folders — do not survive even the basic version. Second, what is not on the device cannot be read from it: minimisation beats concealment.
How prepared travellers actually do it
The pattern used by people who cross often with professional obligations: decide what genuinely must be on the crossing device; move everything else off it before travel; keep what must travel in encrypted storage that does not advertise itself; and know, for your specific route, what refusal would cost you.
Deniable vaults fit the third step. Sealby’s design means each PIN opens its own vault and the total number of vaults is not recorded anywhere — so an unlocked phone shows a working app with whatever you chose to keep visible. No visible locked container inviting the next question.
After the crossing
If your device was out of your sight or connected to unknown equipment, treat that in proportion to your risk: change important passwords from another device, review logged-in sessions, and if the stakes are professional (sources, clients, patients), follow your organisation’s incident guidance. For most travellers most of the time, the crossing is uneventful — preparation is cheap precisely because you do it before, not after.
This article is general education, not legal advice. Border search powers differ significantly between countries and change through legislation and court decisions. If a crossing matters, check current official guidance for the specific countries involved, or consult a lawyer.