Time-bound licensing that works with zero network access
AuthGuru's RTC Time Dongle carries its own onboard clock and rechargeable battery, independent of the customer's PC — so trial periods, subscriptions, and time-bound terms hold up even fully air-gapped.
A system clock is easy to fake, offline
Time-bound licensing — trials, subscriptions, contract-length terms — usually depends on a clock somewhere. If that clock is the customer's own system clock, it can be reset or manipulated to extend access past what was actually paid for. The RTC Time Dongle removes that dependency entirely.
An independent clock your license can actually trust
The RTC Time Dongle pairs an onboard real-time clock with rechargeable battery power, so time-based terms enforce correctly no matter what the host machine's clock says.
Onboard Independent Clock
A high-precision clock chip with rechargeable battery, fully independent of the customer's PC and immune to system clock changes.
Remote Time Authorization
Extend or renew a dongle's usage window remotely, without requiring the device to be physically reset or replaced.
Usage Count Limitation
Optionally cap the number of uses — the counter decrements automatically until re-authorization is required.
16K Onboard Storage
Up to 16K of storage with no limit on read/write cycles, giving your application room to store license state directly.
Time-Node Control
Set custom time strategies across multiple nodes, giving fine-grained control over how expiration is enforced.
Driverless, Plug and Play
No driver installation required — connects and works immediately across supported USB standards.
4-Page Data Area
Four independent data pages, each configurable as read-only or read-write, for finer control over what can be modified on the device.
On-Board Encryption
Communication encryption with 3DES support, protecting the exchange between the dongle and your application.
Hardware details
Everything your procurement or engineering team needs to confirm fit before deployment.
Why a hardware clock actually matters
An onboard clock isn't a convenience feature — it's what makes a time-bound license enforceable at all, offline.
Tamper-proof time enforcement
Resetting the customer's system clock has zero effect on license validity — the dongle simply doesn't reference it.
True offline capability
No network dependency — a strong fit for genuinely air-gapped, industrial environments. Dongle carries everything to validate license.
Remote renewal without a reset
Extend a subscription or trial remotely, without requiring physical access to the device or a hardware swap.
Common in embedded devices
Common in Raspberry Pi setups, test equipment, and other software running on dedicated hardware.
Works alongside
The RTC Time Dongle solves a specific problem — time-bound terms offline — but it connects to the same licensing, deployment, and protection decisions as every AuthGuru product.
Need licensing terms that hold up without a network?
Tell us about your offline or embedded deployment, and we'll confirm whether the RTC Time Dongle is the right fit.
Start Conversation