Clarification on what we sell

It has come to our attention that some customers are surprised that the TKey we are currently selling in our web shop, is a TKey for end users and consequently has the program memory locked-down.

We apologise if this has not been clear in our communication.

So to be clear: On TKey’s sold via our web shop, since April 3rd, a user can’t change the bitstream or even read out the bitstream (or the UDS) from the TKey, even if the case is broken and the PCBA inserted into a programmer board.

Read more about memory handling in the end user TKey in our tech post here.

Also, read here about how you can verify that the TKey you have is genuine and that the unique identity (UDS) and firmware has not been altered during e.g. shipment from Tillitis to you.

If you want to contact us, you can do so by email to