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Tired of Paying Fees for Access Cards? Duplicate Your Key Card in 5 Minutes with Your Phone

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如何使用手機複製並備份自家門禁卡與電梯卡

Are You Still Paying Excessive Fees for Key Card Replacements?

Have you ever lost your access card and had to pay an exorbitant "administration fee" to get a new one? In reality, most residential access cards are extremely insecure and practically "running naked" in terms of data protection.

Why Are Access Cards So Easy to Clone?

Most residential key cards use the legacy M1 chip technology, which has been widely considered insecure since 2008. Because these cards are cheap to produce, property management companies continue to use them, often turning card replacements into a recurring revenue stream.

The 5-Minute Cloning Method

Modern smartphones with NFC capabilities, paired with the right software, can easily read the data from most non-encrypted or semi-encrypted cards. By extracting the UID, you can clone your card onto a blank "magic card" or directly into your phone’s digital wallet.

The "Rolling Code" Trap

If your original card stops working after you clone it, the management is likely using a "rolling code" system. This security measure forces the card to change its internal data every time it's used, ensuring that clones become invalid and forcing you to pay for a new, official card.

Disclaimer: This article is for educational purposes only regarding technology and security awareness. Please do not use these methods for any unauthorized or illegal activities.

Reference: https://www.youtube.com/watch?v=cpGo6Dg66qk

Frequently Asked Questions

Why does my cloned access card not work?
If the cloned card doesn't work, it's likely because the original card has encrypted sectors. You may need to use an Android phone with professional NFC software to perform a full sector-by-sector clone.
Is cloning my own access card illegal?
Cloning your own access card for personal convenience is generally considered a grey area or harmless. However, using these techniques to access restricted areas without authorization in offices or other residential complexes is illegal. Please use this knowledge responsibly.