Know the reason why the PIN code of an ATM card is 4 digits?

Automated teller machine called ATM is now used by almost everyone and often the cards used to withdraw money from it use a 4-digit PIN code.

But do you know why the PIN code of an ATM card was restricted to 4 digits even though more numbers would have made it safer to use?

Yes, more than five decades ago, a British inventor named John Sheppard Baron came up with the idea of a machine that could get money instead of chocolates.

In this way, he came up with the idea of automated teller machine and in 1967 the first ATM machine was installed in London.

But along with the preparation of the machine, John Sheppard also realized that something had to be done to protect the user, so the solution was found in the form of pin code.

With his old military number in mind, John Sheppard initially developed a 6-digit code.

But in an interview, he said that his wife Caroline rejected the idea while talking in the kitchen.

“My wife said she could only remember four digits and it was because of Caroline that the 4 digit PIN code became a global standard,” he said.

Caroline’s weak memory made the lives of millions of people around the world easier, but keep in mind that it only requires hackers to consider a combination of 10,000 numbers.

By the way, this number is also quite high because most ATM machines are not allowed to type pin multiple times, so the pin code is less likely to be evaluated.

John Sheppard worked on many things in life, but he is known only for his ATM and PIN code.

But he realised its importance when he went on vacation with his wife to Thailand, where a farmer took out a card from his hat and used a cash machine.

It was then that John Sheppard realized that he had changed the world to some extent.

There are now countless ATM machines installed around the world, even in Antarctica.

Know the reason why the PIN code of an ATM card is 4 digits?

Automated teller machine called ATM is now used by almost everyone and often the cards used to withdraw money from it use a 4-digit PIN code.

But do you know why the PIN code of an ATM card was restricted to 4 digits even though more numbers would have made it safer to use?

Yes, more than five decades ago, a British inventor named John Sheppard Baron came up with the idea of a machine that could get money instead of chocolates.

In this way, he came up with the idea of automated teller machine and in 1967 the first ATM machine was installed in London.

But along with the preparation of the machine, John Sheppard also realized that something had to be done to protect the user, so the solution was found in the form of pin code.

With his old military number in mind, John Sheppard initially developed a 6-digit code.

But in an interview, he said that his wife Caroline rejected the idea while talking in the kitchen.

“My wife said she could only remember four digits and it was because of Caroline that the 4 digit PIN code became a global standard,” he said.

Caroline’s weak memory made the lives of millions of people around the world easier, but keep in mind that it only requires hackers to consider a combination of 10,000 numbers.

By the way, this number is also quite high because most ATM machines are not allowed to type pin multiple times, so the pin code is less likely to be evaluated.

John Sheppard worked on many things in life, but he is known only for his ATM and PIN code.

But he realised its importance when he went on vacation with his wife to Thailand, where a farmer took out a card from his hat and used a cash machine.

It was then that John Sheppard realized that he had changed the world to some extent.

There are now countless ATM machines installed around the world, even in Antarctica.

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