The parking meter
The first meters accepted coins and had a dial to engage the timing mechanism with a red flag to indicate expiration of time. Those meters required a service person to keep the mechanism wound. Later iterations by other companies provided a system that remained wound by the action of the user setting the time, eliminating the need for service personnel. Since the parking meter made its debut there have been many styles and mechanisms deployed. All of which have completed the same task, measuring an amount of time for a price. Manual mechanisms remained in service for fifty some years until advancement in technology allowed for digital operations in the 1980’s.
At this point in our history lesson drivers looking to park their cars still had to use coins. Some machines only accepted one kind of coin. Different variations of the parking meter existed depending on the maintenance and replacement by local governments.
Smart parking meters
Are smart parking meters secure?
The International Parking Institute released a report titled, "What's What in parking Technology" in 2016. The report describes a point-to-point credit card encryption method, which delivers end-to-end encryption. The method instantaneously converts credit card data into an indecipherable code at the time the card is swiped to prevent hacking. Similar to how Apple Pay creates a token that has no exploitable meaning or value except to the key holders at either end of the transaction. This allows the meters to communicate directly to the banks.