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Data Structure of Mifare S50 RFID Card   (Feature photo quote: https://pressola.uk/product/mifare-1k-s50/)   S50 Data Sheet Download   Mifare S50 (also known as Mifare Classic 1K) is one of the most commonly used high-frequency RFID cards. Its data structure adopts a "sector-block" hierarchical design, following strict storage rules and access control logic. Here is a detailed explanation of its data structure: I. Overall Storage Capacity and Division The total capacity of Mifare S50 is 1024 bytes, divided into...

Detailed Explanation of Bank UnionPay IC Card Reading Process     The card reading process of UnionPay IC cards complies with the PBOC specification and ISO 7816 standard, implemented through multiple rounds of APDU (Application Protocol Data Unit) command interactions between the card reader and the card. Below is a detailed breakdown based on the latest technical documents. I. Initialization Phase: Power Supply and Protocol Negotiation 1. Power Activation and Reset The card reader provides power...