Why does the display need password protection?

​​Q: What should I do if the content of LED screens in public places is tampered with? ​ ​
In 2023, more than 2,000 illegal outdoor digital signage invasions occurred around the world.​ ​Password protection system​​Become the key to avoiding legal risks:

• ​​Prevent content tampering​​: Unencrypted control systems may be implanted with illegal information and face a fine of up to 500,000 yuan;
• ​​Protect engineering parameters​​: Maliciously modifying core parameters such as refresh rate and brightness will shorten the screen life by 60%;
• ​​Permission hierarchical management​​: Operator, administrator, and auditor three-level account system to reduce the probability of misoperation.

Three core locations for password settings

​​Q: Which modules in the control system must be encrypted? ​ ​

1. ​​Project mode entrance​​

   • When entering through the "#9876+" key combination, 6-digit password must be verified to prevent non-technical personnel from accidentally touching the grayscale correction parameters;
   • ​​suggestion​​: Forced to modify the default password for the first time (such as 123456) and replace it once a quarter.

2. ​​Wireless transmission channel​​

   • WiFi/Bluetooth connection requires WPA3 encryption protocol.​​100 times more difficult than traditional WPA2 cracking​​；
   • ​​Case​​: The LED screen in a shopping mall has been tampered with the promotional information by devices 15 meters away 37 times because it is not encrypted in Bluetooth.

3. ​​Content publishing platform​​

   • Cloud account binding secondary verification (SMS/Fingerprint), which can prevent logging in remotely even if the password is leaked;
   • ​​Data comparison​​：

     Protection level	The length of time the account was stolen
     Single password	Average 2.5 hours
     Two-factor	More than 30 days

Operational misunderstanding: These settings are equivalent to no encryption

​​Q: Why is the password still cracked? ​ ​

• ​​Insufficient password complexity​​：

  • Error case: Use combinations of rules such as "led@2024" and crack the hacker dictionary library in the first round;
  • ​​Safety Plan​​: Mixed case + special symbol + meaningless phrase (such as Tq9$kP!z).

• ​​Physical interface not controlled​​：

  • The HDMI/USB debug port is exposed, and you can bypass the password to read the control card data;
  • ​​The correct way to do it​​: Install physical locks and reduce the interface supply voltage to the safety threshold.

• ​​Log audit missing​​：

  • The password modification record is not recorded, and the operator cannot be traced back when a dispute arises;
  • ​​suggestion​​: The system automatically saves the 90-day operation log, and triggers a text message alarm when abnormal movements.

​​Industry Observation​​: The penetration rate of smart displays reached 68% in 2024, but 43% of users still ignore firmware password updates. The real security protection is​ ​Hardware encryption chip + dynamic key + regular penetration test​​The trinity system is not a simple character combination.

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