A SIM swap attack does not require access to your devices. A co-conspirator at a mobile carrier, or a patient social engineering call, is enough to redirect your number, receive your two-factor codes, and work through your accounts within the hour. This is a documented, repeating threat. The target is access, which can be monetised quickly.
The same pattern runs through hotel wifi interception, phishing pages that relay credentials in real time, and the passive tracking that happens whenever a device with active radios is on your person. None of these require sophisticated adversaries. They require only a consistent attack surface.
What hardware privacy actually is
Most privacy advice focuses on software. Use a VPN. Enable two-factor authentication with an app. Configure private DNS. That advice is incomplete.
Software-only privacy has an attack surface that includes every app update, every OS change, and every moment of inattention on your part. Hardware-based solutions remove some of that surface permanently. A physical security key cannot be phished by a convincing website. A Faraday pouch does not require correct configuration. A travel router applies encryption at the network layer before any device connected to it makes a decision.
Hardware privacy tools are not ideological. They are a category of productive capital: objects that do their job reliably without demanding your ongoing vigilance.
The tools
YubiKey 5C NFC, from EUR 69
Most accounts are compromised at the authentication layer. Passwords get reused across breached databases. SMS codes get intercepted via SIM swap. Authenticator app codes get relayed by phishing proxies in real time, faster than you can notice.
A FIDO2 hardware key closes all three vectors. You cannot phish a physical object out of someone’s hand. The YubiKey 5C NFC covers USB-C and NFC, supports every major service that has adopted FIDO2 (Google, Microsoft, GitHub, Cloudflare, and hundreds of others), and runs current firmware 5.7. Buy two: one to carry, one registered as a backup and stored separately.
GL.iNet Beryl AX, from EUR 102
Hotel networks, conference venues, and co-working spaces are not secure. The standard fix, running a VPN app on each device, requires correct setup every time. A travel router creates a WireGuard tunnel that every connected device inherits automatically, with no per-device configuration. The Beryl AX runs OpenWrt natively, supports WireGuard at up to 700 Mbps, and is roughly the size of a deck of cards. If you travel for work more than a few times a year, this is the highest security return per euro spent on portable hardware.
SafeSleeve Faraday pouches, from approx. EUR 28
A Faraday-shielded pouch blocks all radio signals from a device inside it. The most practical everyday use case is the key fob: relay theft of keyless-entry fobs is common across Europe and the UK, and a Faraday pouch for your car keys is the straightforward countermeasure. SafeSleeve manufactures FCC-tested pouches for key fobs (approx. EUR 28), phones (approx. EUR 46), and tablets (approx. EUR 55).
Trezor
If you hold meaningful cryptocurrency, hardware cold storage is the baseline. If you do not hold crypto, skip this entirely.
Where to start
Begin with the YubiKey. Register it on your primary email account, Google or Microsoft account, and any professional or financial services that support FIDO2 security keys. Setup takes twenty minutes. The most common account-takeover vectors close immediately.
Add the GL.iNet on your next work trip. The Beryl AX at EUR 102 is the recommended starting point; it handles both VPN tunnelling and the WireGuard setup in a single device.
Add Faraday pouches when the specific threat applies to you. The key fob case is the clearest daily use.
The threat model for digital privacy has shifted faster than the hardware market has noticed. Capable AI systems can now read, correlate, and act on personal data at a scale that was theoretical until very recently. Decades of leaked credentials and metadata, unprocessable by humans, are now processable by a single capable model that can assemble a detailed identity profile from a username, an email, and a few stray data points in seconds. The same logic applies to social engineering. Convincing impersonation once required time, language skill, and specific knowledge of the target. Voice cloning and personalised phishing have removed all three constraints. Hardware FIDO2 keys close the credential vector regardless, because a physical key cannot be phished.
Behavioural inference is a subtler vector but a real one. AI can fingerprint individuals across supposedly anonymous accounts by writing style, posting cadence, and metadata patterns. The response is to keep more things off the network. Automated reconnaissance has reached the same inflection point: open-source intelligence that once required manual craft is now a script. Anything that runs on a hostile network is being inventoried in real time. A travel router with a WireGuard tunnel and a Faraday-shielded key fob are no longer security upgrades for careful travellers. They are the baseline.
Encryption is not broken. None of this hardware is a quantum-resistance hedge. The point is narrower: the human-facing edge of the digital security stack, credentials, social engineering, behavioural inference, is being automated at pace. The hardware described here closes those specific vectors. The right time to own it is before the cost of not owning it shows up in your accounts.
For the broader argument on buying productive capital before the window closes, see The Case for Buying Now, While You Still Can. If you are reconsidering how you own your tools generally, The Subscription Trap covers the ownership calculus in more detail.
Where to buy
- YubiKey 5C NFC: [yubico.com – direct link or Amazon Associates (see editor flag 4)]
- GL.iNet Beryl AX: [gl-inet.com EU store – affiliate link to be inserted via /go/gl-inet/]
- SafeSleeve Faraday pouches: [safesleeve.com – affiliate link to be inserted via /go/safesleeve/]
- Trezor: [trezor.io – affiliate link to be inserted via /go/trezor/]
GL.iNet, SafeSleeve, and Trezor links above are affiliate links. Finite Resources earns a commission on those purchases at no cost to you. The YubiKey link is [direct with no commission / via Amazon Associates (decision pending – see editor flag 4)].