<p><img src="https://images.cointelegraph.com/images/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjQtMDMvZWFmYmQ4YjgtNmVmOS00ZTA4LWIwMTQtY2ZmMWE1NTZkMmEzLmpwZw==.jpg"></p><p>The Riksbank designed a system using payment cards and shadow wallets, but security and accounting problems remain.</p>