furstimus
furstimus t1_j69qzng wrote
Isn't this really common? I rarely see these in any other shape.
furstimus t1_iwzp2wy wrote
Reply to ELI5 How do card readers for online banking work if they are not connected to the internet? by Koopatrillion
Do you mean the ones that generate a code for you to log into your online banking? They are done by having a secret key code which is stored in the device and known by your online banking. Online banking will all you to enter a code into the device, the device will then do a sum including the code and secret key and return a new value which is your login.
furstimus t1_j9yak6e wrote
Reply to An old baseball I found in the hedgerow by babyabeers
Put it in a jar with a lid on and watch it grow!