Showcase Customer Project
Digitaler Klingelbeutel
(Digital Collection Bag)

Project: Klingelbeutel

  • Project goal
    Seamless NFC payment for church collection and donation handling
  • P3KI's contribution
    Bi-directional authorization of offline device bootstrap
  • Partner
    • digital.Wolff, Plötz & Co. GmbH
    • EKBO, Evangelical Church Berlin-Brandenburg-schlesische Oberlausitz
    • KKBS, Parish ofs Berlin City Central
    • Evangelische Bank eG

Unique Constraints

  • Requirement for efficient, quick, and secure device rental processing
  • Flexible delegation handling
  • Offline scenario
  • No reliable clock on field devices
  • User-base not tech savvy

Goal & Challenge

Offline Authorization

Solution for Timeless Terminals

Revocation Day up to Now

Revocation Day w/

Trust yourself!
Gregor Jehle

P3KI GmbH c/o Recurity Labs GmbH
Wrangelstr. 4, 10997 Berlin
+49 (0)30 695399933 (Berlin)
+49 (0)711 22051252 (Stuttgart)