PowerVerify Cable

You shouldn’t have to trust your charger. You should be able to prove it.

Public USB ports and unknown cables can move data, not just power — the reason the FBI and FCC have both warned travelers about “juice jacking,” and why the FCC’s guidance is to use a charging-only cable from a trusted supplier.

Here’s the problem with most “data blockers”: they ask you to trust that the data path is switched off. Software can be wrong. Switches can fail. You can’t see any of it.

PowerVerify doesn’t switch the data lines off. They’re not there. As the device itself says: When physics is policy, trust is optional.

Don’t trust it. Verify it.

See it. Look straight through the clear, cast resin. No data traces, no chips, no firmware — just input surge protection, a VBUS filter, and output surge protection, with every pin labeled and every part named on the board. The D+ and D− pads are marked NC. The source connector is a 6-pin power-only USB-C part, and the board says so along its edge: USB-C SOURCE IN — POWER-ONLY 6-PIN — NO D+/D− PINS. Across the middle, in silkscreen: DATA LINES PHYSICALLY ABSENT — NO USB ENUMERATION.

Prove it won’t talk. Plug a computer into the input and your phone into the output. Your phone charges — and never appears as a USB device. No notification, nothing in Device Manager, nothing in System Information. It can’t enumerate, because there’s no data path to enumerate over. This takes thirty seconds and it doesn’t require believing a word we’ve said.

Look it up. Every unit carries a serial and a verification code — printed on the label sealed inside the resin, alongside a QR code. Scan it or enter the code at verifyknot.io to pull the manufacturing record for the specific unit in your hand.

Power flows over VBUS and GND. Your charger and device negotiate voltage over the CC pins. The D+/D− data pins simply don’t exist in the connector. Your charger can’t reach your device — not because the path is disabled, but because it was never built.

Every claim is printed on the object, permanently

We can revise this page. We can’t revise the board. So the claims live there too, in silkscreen, where they can’t be quietly walked back:

5–20V DC POWER, 60W MAX.
DATA LINES PHYSICALLY ABSENT — NO USB ENUMERATION
SAFE POWER ONLY · DATA ABSENT
Your charger can’t spy through this.
When physics is policy, trust is optional.

Under the pot on the reverse: the serial, the verification code, the QR, the revision, the patent application number, and verifyknot.io. If we ever overstated this product, the evidence would be cast in resin in a customer’s hand.

Built as evidence, not as an accessory

Every PowerVerify is a serialized object with a build record, not an anonymous cable:

• It’s sealed in a single solid pour of clear resin — no seams, no screws, no shell to pop open. To reach the board you’d have to destroy the unit, and the embedded serial label goes with it.
• A serial and verification code link the unit to its registered manufacturing record at verifyknot.io.
• It’s hand-built in small batches — placed, reflowed, potted, cured, then wet-sanded through 3000 grit and polished. The finish isn’t decoration. A pot you can’t see through can’t be inspected, and inspection is the entire product.

Straight talk about what that record is

We sell honest proof, so here is precisely what the record does and doesn’t do.

What it is: ZKNOT’s signed statement that we built this specific unit, and when. A birth certificate, signed at our bench with our provisioning key. A provenance trail you can look up instead of taking on faith.

What it is not: it is not a claim made by the cable. This unit is passive — no microcontroller, no secure element, no key. It signs nothing, at the bench or in the field, and it cannot record or attest a charging session because it has nothing to record with.

And it is not an independent third party vouching for us. That signature is ours. It proves the record hasn’t changed since we filed it. It does not prove we’re honest — nothing signed by us ever could. What it does is make our claim specific, dated, and checkable, so that if we ever lied about a unit, the lie would be a fixed target instead of a vague impression.

That’s the standard we hold everything here to. We’ll always tell you exactly what a claim is and what it isn’t.

Specifications

• USB-C power-only input (6-pin, no D+/D− pins) → USB-C plug to your device (~50 mm pigtail)
• 5–20V DC, 60W max — passes your charger’s USB-C Power Delivery straight through
• Input + output surge protection (TVS diodes)
• VBUS filtering capacitor + ferrite EMI suppression
• Fully passive — no microcontroller, no secure element, no firmware, no software
• Solid clear-resin potting — no seams or screws, full visual verification; reinforced cable strain relief
• Serialized; manufacturing record registered at verifyknot.io
• Patent Pending — U.S. Application No. 63/961,118
• Designed and hand-assembled in Utah · veteran-owned (SDVOSB)

What it deliberately does NOT have

• No data lines. D+/D− are physically absent from the connector and there are no data traces on the board. USB enumeration is impossible.
• No chips. No firmware. No software. It’s a passive cable. Nothing to update, exploit, or phone home.
• No cloud dependency. It works offline, the same way, forever.
• No battery, and nothing to wear out but the connector itself.

Who it’s for

Travelers charging in airports, hotels, and cafés · journalists and researchers handling sensitive devices · attorneys and investigators handling digital evidence · security teams who buy on evidence rather than datasheets · anyone who saw an FBI or FCC warning about public USB ports and wanted proof instead of a promise.

Who it’s not for

If you just need a charge-only cable at home, a $5 blocker is fine. PowerVerify is for people who need to verify, not trust — and to hand someone else the means to verify too.