j2a040

  1. chushpan

    How J2A040 Cards Work

    Cards marked J2A040 belong to the category of Java cards, which are used to store and process data in a secure environment. These cards are often used in banking, telecommunications (for example, SIM cards), access control systems and other areas where high security is required. Let's look at...
  2. K

    what's wrong i do?

    I think I'm doing everything right, what's wrong? video link: https://streamable.com/1yxrdy and so on at any ATM https://streamable.com/yomiq7
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