flexClass (HID iClass)

The flexClass is the only HID iClass-compatible subdermal implant on the market.

The flexClass is a subdermal flex implant designed and developed by community member @leumas95. It is fully encapsulated in our special biopolymer. It contains a programmable 13.56 MHz high-frequency HID standard iClass transponder chip, allowing you to register it with your HID access system or clone/copy HID iClass credentials using a Proxmark.

* Normally, it’s as simple as enrolling it, but sometimes HID iClass systems won’t write to a blank chip and require cloning a legitimate card.

flexClass Kit

The flexClass kit includes the following items.

• flexClass 2kB implant, sealed in a vial with chlorhexidine solution
• Special 4G (5 mm) flex installation needle (unsterilized)
• 1 packet of local anesthetic numbing gel

Types of iClass Chips

The flexClass chip works with iClass “legacy” or standard iClass systems, but not with iClass SE or iClass SEOS... although there are some tricks to bypass these limitations (just “hacks”). These options are currently being explored but are not yet fully clarified. There are several different types of iClass cards and chips in the world, and it’s not easy to identify them, as the term iClass does not describe a specific product, protocol, or standard. HID uses iClass purely as a marketing term, so it’s not straightforward to determine which types of iClass systems use which types of chips. If you have questions about compatibility with your system, post them in the forum. We have community members there who can help you.

Using the flexClass Implant

You have two options for using your flexClass with your HID iClass standard system - Enrollment or Cloning.

• Enrollment is the usual way to connect a new credential to an HID access control system. Normally, you go to the security office to get a new badge, fob, or card, and the security officer pulls out a new credential and “registers” it. This process basically involves holding the card up to a reader on the desk, but secret data is written to the new credential's chip and linked to you (or the intended person) in the system. If you can convince the security officer, you should theoretically be able to hold your flexClass chip to that reader during registration, and everything should work fine. However, in some cases, there are technical reasons why the flexClass cannot be enrolled. If that’s the case, you’ll need to go with option 2 - cloning.

• Cloning means copying key identification data used by the access control system to identify the credential holder from a physical credential to another. To clone a legitimately registered iClass standard 13.56 MHz credential to your flexClass, you need a Proxmark3 and some specific commands. More information on cloning HID iClass legacy/standard credentials can be found in this forum post: https://forum.dangerousthings.com/t/cloning-an-hid-iclass-credential-to-your-flexclass

Professional Installation Notes

The flexClass implant is about 7.5 mm wide and 25 mm long, with an average thickness of 0.4 mm. Installation should always be performed by a professional.
Do not install the implant under a grip surface (e.g., do not install it on the palm side).
Do not place it over or parallel to joints (flexible implants are only “semi-flexible”).

Important Information About Flex Implants

• The biopolymer is tested and certified to ISO 10993 and USP Class IV. However, the final product has not been tested after processing, meaning that material changes during processing could make the final product unsafe in some way.

• There is no "preferred" location for installing a flex device. Customers are free to place a flex device anywhere on the body as long as it’s within the fascial layer between the dermis and muscle tissue, and not in a flexion area or under a gripping surface. Even though we use images showing installation above the second metacarpal bone of a finger, this is not an ideal location for such a device. Fingers are full of tendons, nerve bundles, and very important structures packed in a tight space. We strongly recommend considering simpler locations such as the back of the hand or the arm/wrist.