Signet High-capacity

by Nth Dimension

An all-in-one encrypted USB flash drive, two-factor authentication token, and password manager

View all updates Nov 08, 2019

First Parts Arrived

We are well on our way to mass producing Signet HC units, although a component shortage will delay assembly completion until January. We have the initial batches of all of our parts, which all seem to be up to specifications.

Enclosures shipment

We received a batch of 550 Signet HC enclosures from SeaSky Tooling. They were thoughtful enough to protect the surface of each enclosure part with a plastic covering. The enclosure halves snap together just like the samples, they house the PCB snugly, and we haven’t seen any problems with the surface finish.

Fulfillment delays expected

Due to microcontroller shortages we were only able to order one panel to be assembled: we won’t get a reliable supply until early December so we can’t ship units until at least mid-January.

First PCBA panel

We have received the first panel from PCBWay. We got the panel later than we hoped due to some shipping delays and a part orientation problem that luckily we were able to spot in images PCBWay sent to us before packaging.

There was only a small layout change between these boards and the prototypes. As hoped the boards are passing all of our tests.

Software development process

We have decided to take a document and test driven approach to Signet HC software development. We will be creating tests, and internal documentation, and end-user documentation for each feature before development is finished. This will slow down the release of features but we think the effort will pay off with fewer bugs and easier to use software; though in light of the microcontroller supply delay, documentation and testing won’t impact the number of initial features offered.

Here are the features we expect to deliver initially:

  • Password management and database features
  • Device backup and restore
  • Fault tolerant firmware upgrade
  • Basic volume support: Read-only, encrypted, and unencrypted volumes
  • Cryptographic engine (partial feature set)
  • One-time use volumes

The features we plan on adding in a software update after shipping are:

  • Physical volume support
  • Multi-profile support
  • Cryptographic engine (complete feature set)

$20,028 raised

of $6,000 goal

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Product Choices


Signet HC

An all-in-one physically secured USB flash drive, authentication tool, and personal information manager you can take with you wherever you go.


USB Extension Cable

Helps keep your Signet HC close to your keyboard when the closest USB port is too far away. Can also reduce strain on the device's connector to increase its lifespan. 3'

USB Extension Cable


Micro-USB Host Adapter Cable

Connects your Signet HC to a USB-micro Android device. 6"


Nth Dimension

Producer of privacy and security focused open source electronics.

Neils Nesse


Mingjane Wu

Technical writer / UX designer


PCBA Manufacturer

Sea Sky Tooling

injection molding

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