Description
The Threat Is Real. The Fix Is Simple.
A USB data blocker for Australia — specifically, one that physically cuts the data wires rather than relying on software. Every USB port carries two things: power and data. That’s fine at home with your own charger. But plug into a public USB port — airport lounge, hotel room, rental car, rideshare infotainment, a borrowed laptop — and you’re trusting that port completely.
There are now two well-documented attacks that exploit this trust.
Attack 1 — Juice jacking
A compromised public USB port can:
- Push malware onto your phone the moment you plug in
- Copy photos, messages, contacts, and files off your device
- Trigger developer and debugging modes that expose more than you realise
- Bypass the “trust this device?” prompt in certain conditions
The FBI has issued public warnings about juice jacking. Major US airports have signs telling travellers not to use public USB ports. It’s been demonstrated by security researchers on live conference stages. It’s not science fiction, and no software update fixes it — because the vulnerability isn’t software.
Attack 2 — Malicious cables (the O.MG cable)
The newer threat. An O.MG cable looks identical to a normal USB cable — same braided sheath, same connectors, same weight. Inside the connector is a tiny wireless implant that lets an attacker remotely capture keystrokes, exfiltrate data, and inject commands the moment the cable is plugged into a target device. They’re sold openly online for under a few hundred dollars and have been demonstrated at every major security conference for years.
The threat scenario: someone leaves a “forgotten” charging cable on a desk, in a hotel, at a co-working space, or in a conference goodie bag. You pick it up, plug your phone in, and the attacker walks off with whatever they came for.
A USB data blocker stops both attacks the same way. There’s no wire for data to travel along — not from the port, not from a tampered cable. Whether the threat is the wall, the cable, or both, the fix is identical: physically disconnect the data path.
Which Variant Do I Need?
Check the end of your cable that plugs into the charger (not the end that goes into your phone), and pick the matching variant from the dropdown above.
USB-C to USB-C — our default and the one we recommend for most people. Both ends are USB-C. This variant is built as a short extension cable rather than a stubby adapter, which means two things: you can plug it directly into your phone without needing a separate charging cable in the loop, and it physically protects against malicious cable attacks like the O.MG cable. Modern phones, modern laptops, modern power banks — this is the variant that fits today’s gear and tomorrow’s. Supports full USB Power Delivery for fast charging.
USB-A to USB-C — for cables that are USB-C at the phone end and USB-A (the older flat rectangular plug) at the charger end. Use this when plugging a modern phone into an older USB port — still very common in airports, hotels, and rental cars. Standard charging speeds (5V, up to 2.4A).
USB-A to USB-A — for cables where both ends are the older flat USB. Less common with modern phones, but still useful for older accessories, power banks, and laptop chargers. Standard charging speeds.
USB-C to USB-A — coming soon. For the less common case where your cable is USB-A to USB-C and the adapter goes at the charger end. Drop us a message via Telegram if you need this variant.
Not sure? If your phone is anything from the last five or six years, USB-C to USB-C is almost certainly the right pick. It works directly with the phone, it covers modern airports and hotels, and it protects against the cable-based attacks the older variants don’t.
How It Actually Works (No Marketing Fluff)
A standard USB cable has four wires inside:
- Two for power — VCC (positive) and GND (ground)
- Two for data — D+ and D−
Power flows through VCC and GND. Data — files, commands, anything your phone talks to the other device about — flows through D+ and D−.
Inside this product, the two data wires are physically disconnected. There’s no software, no filter, no clever circuitry. Just a missing connection. Data has nothing to travel along.
Result: your phone charges normally. The other device sees nothing. It can’t detect your phone as storage, can’t push files or malware, can’t read anything off it, can’t issue commands.
PortaPow have built their reputation on transparency — their adapter range uses clear plastic so you can physically see the missing data wires. The cable variant uses the same internal design. This is the kind of product where honesty is built into the hardware, not the marketing.
What It Does / What It Doesn’t Do
Honest about limits — because we’d rather you trust the product than oversell it.
✓ What It Does
- Blocks data transfer in both directions between your device and the charging port
- Prevents malware being pushed to your device through a compromised cable or charger
- Stops malicious cable attacks like the O.MG cable from reaching your device
- Stops “trust this device?” prompts when plugging into cars, shared computers, or public stations
- Works with any phone, tablet, or laptop that charges over USB
- Supports USB Power Delivery (PD) on the USB-C to USB-C variant — full fast-charge speeds
- Reusable indefinitely — no battery, no firmware, no maintenance
✗ What It Doesn’t Do
- Doesn’t make your phone “private” — this is specifically for untrusted charging, not a general privacy tool
- Doesn’t block tracking over cellular networks, Wi-Fi, or Bluetooth — that’s what a deGoogled phone is for
- Doesn’t work in reverse for your own gear — if you plug this between your laptop and your phone, you won’t be able to transfer files. Save it for untrusted ports.
- May limit fast-charging on the USB-A variants — standard charging only (5V, up to 2.4A). The USB-C to USB-C variant supports full PD.
If you want a fully private phone, see our deGoogled phone range. If you want to block all signals, see our Faraday bags. If you want to charge from dodgy ports without worrying — that’s what this is for.
Who This Is For
- Travellers — airport lounges, hotel rooms, rental cars, and rideshares all have USB charging. Not all of it is safe.
- Conference and event-goers — public charging banks at expos and events are a known attack vector. “Forgotten” cables in goodie bags are now a documented risk too.
- Office workers — shared charging stations and conference rooms with permanent USB cables.
- Anyone with a rideshare or friend’s car — modern infotainment systems routinely read phone data when plugged in, even when you haven’t agreed to it.
- Laptop users with USB-C charging — if your laptop charges over USB-C (most modern MacBooks, Dell XPS, ThinkPads, Framework, and our Linux laptop range), the USB-C to USB-C variant works for laptops too. One product, both devices.
- Owners of deGoogled phones — if your phone holds your whole life in an encrypted vault, a few dollars to protect the charging port is obvious.
Why We Stock PortaPow (And Not Generic Alternatives)
There’s a market full of cheap data blockers from no-name brands. Many of them don’t actually work properly — independent teardowns by the security researchers who created the attacks these products defend against have shown that plenty of generic blockers either leak data or just don’t do what they claim. With a product whose entire job is “physically remove these two wires”, you don’t want to find out yours was assembled wrong.
We stock PortaPow because:
- They’ve been making these since 2009 — longer than any competitor
- The construction is transparent — the adapter range lets you literally see the data wires are missing
- They’ve been independently tested by the hackers whose attacks they’re designed to defend against
- They’re used by the governments of the US, UK, Canada, and New Zealand, plus hundreds of corporations
- The USB-C to USB-C variant is built as a short extension cable — a design choice that makes it simpler to use and adds protection against malicious cable attacks. No competitor we evaluated does this.
- The product is exactly what it claims to be — no more, no less
It’s the kind of honest product we’re happy to put on our shelves. If you want a USB data blocker in Australia that actually does what it claims, we’ve picked the right brand. If we wouldn’t use it ourselves, we wouldn’t sell it to you.
What’s in the Pack
- Your chosen PortaPow USB data blocker variant
- Resealable storage pouch — fits easily in a wallet, bag pocket, or travel kit
- Delivered Australia-wide, tracked
Common Questions
Will this stop my phone being tracked?
No. This only stops data transfer through the USB port. If you want to stop tracking over cellular networks, Wi-Fi, or Bluetooth, you need a Faraday bag. If you want to stop Google and app-level surveillance, you need a deGoogled phone.
What’s an O.MG cable and does this protect against it?
An O.MG cable is a malicious USB cable that looks identical to a normal one. The connector contains a wireless implant that can capture keystrokes, exfiltrate data, and inject commands once plugged into a target device. They’re a known threat in security circles and have been demonstrated at every major hacker conference. Yes, this product protects against them — because the data wires are physically cut, the implant has no path to your device. The USB-C to USB-C variant is the strongest defence here, since it slots between the cable and your phone.
Can I use it with my own charger at home?
You can, but there’s no point. It’s meant for untrusted public ports. At home, just use your own cable — that’s already safe.
Will fast charging still work?
USB-C to USB-C variant: yes, supports USB Power Delivery (PD) — fast charging works normally. USB-A variants: standard charging only, up to 2.4A at 5V. Fine for overnight or a long sit, but not as fast as your home charger.
Does it work with iPhone?
Yes, if your iPhone uses a USB-C cable (iPhone 15 and later). Older iPhones with Lightning cables need a different adapter.
Will it wear out?
No. There are no moving parts, no electronics that degrade, no battery. It should last years of daily use.
I already have a deGoogled phone — do I still need this?
Yes. Different tools, different threats. A deGoogled phone protects you from Google and app-level surveillance. A data blocker protects you from physical USB-based attacks that don’t care what operating system you’re running.
Can I use it with a power bank?
Yes, and it works perfectly. Power banks don’t need data to deliver charge.
Is it safe for laptops?
If your laptop charges over USB-C — most modern MacBooks, Dell XPS, ThinkPads, Framework, and the laptops in our Linux laptop range — yes. The USB-C to USB-C variant supports USB Power Delivery and will charge your laptop normally from any USB-C charging port. We actively recommend it for anyone working out of cafes, hotels, or co-working spaces. The USB-A variants are limited to 2.4A at 5V — not enough power for laptops. If your laptop uses a barrel-plug charger rather than USB-C, this product won’t apply to laptop charging.
A Note on the USB-C to USB-A Variant
We’re currently sourcing initial stock on the USB-C to USB-A variant. If you need this specific variant, drop us a line via Telegram and we’ll let you know when it lands. The USB-A to USB-C variant (above) covers most public charging scenarios in the meantime.
