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A PIN, acronym for Personal Identification Number, is a numeric code used to authenticate a user's identity. This code is often employed to protect access to electronic devices such as mobile phones, credit cards, ATMs, and online accounts. The PIN, usually consisting of 4 to 6 digits, is a security measure that helps prevent unauthorized use of sensitive information and personal devices.

In everyday life, the use of a PIN is common in many situations. For instance, when purchasing a new prepaid SIM card, it needs to be unlocked by entering the PIN found behind the silver strip on the original card. In the case of data SIMs, it is essential to disable the PIN to ensure that connected devices remain connected without service interruptions.

In Switzerland, the use of PINs is widespread and integrated into banking and payment systems. Swiss banks provide debit and credit cards that require the PIN for transactions, ensuring a high level of security for customers. Additionally, many online services and banking apps in Switzerland use the PIN as part of the two-factor authentication (2FA) process, further enhancing protection against fraud. The focus on security and privacy in Switzerland has led to strong adoption of secure practices such as using the PIN, contributing to maintaining consumer trust in digital services.

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