What is a flicker code? All information

As an online banking customer, you will receive a TAN generator through which order-based TANs can be generated. This procedure is used for transaction security. In order to complete a transfer, for example, a flicker code is required for the "chipTAN" procedure.

The flicker code: Here's how the technology behind it works

Flicker codes are scanned by your TAN generator during the chipTAN procedure and thus, in combination with your bank card, result in a TAN to confirm the executed transaction.

1. A flicker code is a flashing graphic during an online transfer that must be scanned by your TAN generator.
2. Each individual flashing bar hides an encoding that contains information about the ordering party, their account number and many other data.
3. The sensor on the back of your device has five photosensors, each scanning four bits and a clock signal.
4. Each bit has a checksum that results from the calculation of different data.
5. Included are, for example, the length of the code, as well as the account number and a transaction number.

That's why the code is used for confirmation

After you put your card into the generator, neither it nor the device knows what should be done.

1. By scanning the code, the device receives the necessary information to generate a TAN for transcation.
2. Once the scan is done, your generator will guide you through the confirmation of some data such as amount and account number, which you must first confirm before it can now generate the TAN based on the code.