The Nuki Keypad uses the same encryption mechanism you already know, because it is also used for communication between the Nuki App and Nuki Smart Lock.
We present the Nuki Keypad 2.0 - Now you can open your door with your fingerprint! - Nuki
Security through code protection – Nuki Support
Nuki Keypad Combo Bundle Review
Nuki Club: Exclusive benefits, offers & free membership - Nuki
Protective Cover for Nuki Keypad 2.0 in Black - Denmark
Nuki Keypad Combo Bundle Review
Nuki @ IFA 2018: Product innovation on board! - Nuki
Ultion Nuki smart lock review: simple to fit and secure
Nuki Keypad – Simply for everyone. Secure for everyone.
Keypad 2 - Open your door with your fingerprint