Millions of people across the UK are using insecure passwords. A new analysis conducted by the National Cyber Security Centre (NCSC) found that "123456" was the most widely used password on accounts breached by cyber attacks. It appeared more than 23 million times while the second most popular was "123456789" which was documented 7.7 million times. The other entries in the top-five included "qwerty" (3.8m), "password" (3.6m) and "1111111" (3.1m).