Contactless IC card (s70)
2023-06-07
Product details :
Chip introduction: Mifare 1 IC S70 (S70 for short) produced by Philips, with a capacity of up to 4K bytes, is a relatively advanced, mature and perfect smart card chip. The communication layer (Mifare®RF interface) of the chip complies with Part 2 and Part 3 of the ISO/IEC 14443A standard, and contains encryption control logic circuits and communication logic circuits inside. The communication between the card and the reader adopts the internationally accepted DES and RES security cross algorithm, with high reliability and security performance.
Chip introduction: Mifare 1 IC S70 (S70 for short) produced by Philips, with a capacity of up to 4K bytes, is a relatively advanced, mature and perfect smart card chip. The communication layer (Mifare®RF interface) of the chip complies with Part 2 and Part 3 of the ISO/IEC 14443A standard, and contains encryption control logic circuits and communication logic circuits inside. The communication between the card and the reader adopts the internationally accepted DES and RES security cross algorithm, with high reliability and security performance.
Product details :
Chip introduction: Mifare 1 IC S70 (S70 for short) produced by Philips, with a capacity of up to 4K bytes, is a relatively advanced, mature and perfect smart card chip. The communication layer (Mifare®RF interface) of the chip complies with Part 2 and Part 3 of the ISO/IEC 14443A standard, and contains encryption control logic circuits and communication logic circuits inside. The communication between the card and the reader adopts the internationally accepted DES and RES security cross algorithm, with high reliability and security performance.
◆ Communication method: half-duplex
◆ Read and write distance: up to 10mm (related to the reader)
◆ The capacity is 4K bytes EEPROM, which is 4 times that of S50. Divided into 40 sectors with a total of 256 blocks
◆ Each sector has independent two sets of passwords and access control
◆ Has a unique serial number, which is 32 bits
◆ Anti-collision mechanism, support multi-card operation
◆ Antenna power coupling and data transmission without external power supply
◆ Contains encryption control logic and communication logic circuit
◆ Working temperature -20℃～50℃
◆ Data retention up to 10 years
◆ Erase and write cycles are greater than 100,000 times, and there is no limit to read times.
Three major characteristics: ① Good protection and confidentiality performance. The S70 chip has excellent anti-counterfeiting security, which is due to: three confirmations before reading and writing data, unique card serial number, transmission data encryption, transmission password and access password protection. Usually, password-protected results are not readable, and only users who know the password are allowed to modify it. Each sector has its own access password, and the user can set different passwords according to the different applications of the sector (storage structure of one card with multiple uses). The sector access passwords are divided into KEY A and KEY B two different passwords. According to the access conditions, the stored data can only be accessed after the key A or key B is verified. ② work reliably. The chip writes the successful and sound data of each transaction into the read-write area after being judged. If the transaction data is incomplete or unsound, the CPU will automatically cancel the transaction. ③ Anti-collision function. All Mifare 1 series chips have a unique anti-collision function, and several Mifare 1 cards can work together without interfering with each other. The Mifare 1 card and various cards can read the data of the card correctly, and the anti-interference ability is quite strong.
Brief features:
◆ Working frequency: 13.56MHZ
◆ Communication rate: 106KBPS
◆ Read and write distance: up to 10mm (related to the reader)
◆ The capacity is 4K bytes EEPROM, which is 4 times that of S50. Divided into 40 sectors with a total of 256 blocks
◆ Each sector has independent two sets of passwords and access control
◆ Has a unique serial number, which is 32 bits
◆ Anti-collision mechanism, support multi-card operation
◆ Antenna power coupling and data transmission without external power supply
◆ Contains encryption control logic and communication logic circuit
◆ Working temperature -20℃～50℃
◆ Data retention up to 10 years
◆ Erase and write cycles are greater than 100,000 times, and there is no limit to read times.
Three major characteristics: ① Good protection and confidentiality performance. The S70 chip has excellent anti-counterfeiting security, which is due to: three confirmations before reading and writing data, unique card serial number, transmission data encryption, transmission password and access password protection. Usually, password-protected results are not readable, and only users who know the password are allowed to modify it. Each sector has its own access password, and the user can set different passwords according to the different applications of the sector (storage structure of one card with multiple uses). The sector access passwords are divided into KEY A and KEY B two different passwords. According to the access conditions, the stored data can only be accessed after the key A or key B is verified. ② work reliably. The chip writes the successful and sound data of each transaction into the read-write area after being judged. If the transaction data is incomplete or unsound, the CPU will automatically cancel the transaction. ③ Anti-collision function. All Mifare 1 series chips have a unique anti-collision function, and several Mifare 1 cards can work together without interfering with each other. The Mifare 1 card and various cards can read the data of the card correctly, and the anti-interference ability is quite strong.
Storage structure: S70 is divided into 40 sectors with 256 blocks, of which 0-31 sectors are 4 blocks per area, 32-39 sectors are 16 blocks per area, and the absolute address is 0-255 according to the block number Each block is 16 bytes, and the block is the basic access unit. The tail block of each sector (block 3, which is the 4th block of absolute address and block 15, which is the 16th block of absolute address), contains the password A (6 bytes) and access control (4 bytes) of the sector ) and password B (6 bytes), is a special block, which stores passwords and access control authority values, and its role is very important! The remaining three blocks are general data blocks. However, block 0 of sector 0 is a special block, which is used to store the manufacturer's code and chip serial number, which is read-only and cannot be changed. Among them, the 4 bytes from 0 to 3 are the serial number of the card, the 4th byte is the check code of the serial number; the 5th byte is the capacity "SIZE" byte of the card; the 6th and 7th characters The byte is the type number byte of the card, that is, the Tagtype byte; the other 8 bytes are additionally defined by the manufacturer.
Configuration key points: the tail control block of each sector plays an important role, and the correct authentication and modification rights of the password are controlled by the restriction of the access control value. The three cross-verifications of the formed card/machine must completely match to read and write data effectively.
Typical application: Since the S70 chip card has the above incomparable advantages and supports a multi-purpose storage structure, it is suitable for multi-purpose electronic wallets, road tolls, bus automatic ticketing, and multi-purpose applications such as one card. It can meet different functions of payment transaction and multi-information management, such as enterprise card, campus card, family payment card, etc., bus stored value card, highway toll, parking lot, community management, comprehensive management of colleges and other applications, Mifare 1 IC S70 will play an excellent performance.