1. Differences in working principles
U-shield stores and records the user's personal digital certificate. When the user makes an online transaction, the bank sends the user a time string, an address string, an easy information string, and a replay attack prevention string combination to encrypt to obtain string A. Perform an irreversible operation on string A based on the personal certificate to obtain string B and send it to the bank, which will perform the operation at the same time. If the calculation results of the bank and the user are consistent, the user will be considered legitimate and the transaction can be completed.
U disk is a computer that converts binary digital signals into composite binary digital signals, reads and writes to the USB chip adapter interface, and distributes the binary data to the corresponding address of the EEPROM storage chip through the chip processing signal to realize data processing. storage.
2. Difference in nature
U-shield is a high-level security tool provided by ICBC for online banking business.
U disk is a miniature high-capacity mobile storage product that uses a USB interface and does not require a physical drive.
3. Differences in function
U-Shield is used for electronic signatures and digital authentication in online banking, which can ensure the confidentiality, authenticity, integrity and non-repudiation of online transactions. When handling online banking business, it protects the security of online banking funds and avoids various risks such as hackers, fake websites, and Trojan viruses.
U disks are compact and easy to carry, have large storage capacity, are cheap and have reliable performance. The USB flash drive does not have any mechanical devices and has extremely strong shock resistance. In addition, the flash drive is also moisture-proof, anti-magnetic, and resistant to high and low temperatures. Many USB flash drives support a write protection mechanism that prevents the computer from writing or modifying the data on the disk. Write protection prevents computer virus files from being written to the flash drive to prevent the spread of the virus.
Baidu Encyclopedia-U Shield
Baidu Encyclopedia-U Disk