Puzzle 9: October 14, 2019

A few days ago, the Telegraph, a major newspaper in the United Kingdom, published an article about the decreasing use of cash. The article focused on Sweden, where cash is disappearing.1 For example, the Swedes use an app called Swish that “allows instant cash transfers using just a mobile phone number”.2

  1. What are the advantages of a cashless society over one that uses cash?
  2. What are problems of a cashless society that do not exist for a society that uses cash?
  3. Would using block chains solve any of these problems?


  1. H. de Quetteville, “What Can We Learn from Sweden, the Ultimate Cashless Society?”, TheTelegraph (Oct. 10, 2019). Available at https://www.telegraph.co.uk/technology/2019/10/10/can-learn-sweden-ultimate-cashless-society/.
  2. H. de Quetteville, op. cit.

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Matt Bishop
Office: 2209 Watershed Sciences
Phone: +1 (530) 752-8060
Email: mabishop@ucdavis.edu
ECS 153, Computer Security
Version of October 12, 2019 at 4:43PM

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