Alas, I have received private messages recently to ask about this - "I just bought a large LED screen. I forgot after setting up the password. Now I can't even upload the program!" Don't panic, I have seen a lot of this. Last week, there was a boss who opened a shopping mall. He wrote the control password on a post-it note, but was thrown away by the cleaning lady as garbage, and he was so anxious that he jumped. Today I will take you to explore the tricks here.

1. Where is the password stored?

Let’s talk about the first point first—​The password is not hidden in the display​. Many people think that it exists locally like the mobile phone lock screen password, but it is actually a big mistake! The current intelligent control system is divided into three password storage points:

1. ​Control card chip​ (equivalent to the brain of the display)
2. ​Cloud management platform​ (Required for remote operation)
3. ​​Mobile APP local cache​(for temporary storage)

Take the outdoor advertising screen as a chestnut. Its control card is hidden in the back cover of the box and can only be opened with a hexagonal screwdriver. But here we are going to knock on the blackboard-​Industry statistics in 2023 show that 87% of password leakage accidents occur during physical contact​. A chain supermarket suffered a loss last month. When the repairman dismantled the machine, he was sneaked into the password by a passerby, but the large screen was tampered with the playback content in the middle of the night.

2. Don’t step on the five major pitfalls of password security

Some of the most common things new to lose:

• ​Universal initial password(For example, 123456/888888) never changes
• ​​Multiple people share one administrator account​​(Remote employees can also operate remotely)
• ​​Password cycle exceeds 180 days​(2024 Cyber ​​Security White Paper recommends replacement in 90 days)
• ​Login verification is not enabled​ (SMS/email verification must be opened)
• ​​Do not reset password after repair​​ (The temporary password in the technician’s hand must be invalid)

Here is a real story: Last year, there was a stadium's LED fence screen. Because it used the initial password, a hacker implanted a malicious program, and the screen suddenly became black during the competition. Later, after checking the surveillance, I found that the attacker was caused by WiFi in the cafe 3 kilometers away!

3. What should I do if my password is lost? Three life-saving rules

Don't rush to find a hammer to smash the equipment! Try these methods:

1. ​​Find the reset key on the control card​ (Press and hold for 10 seconds to restore the factory settings)
2. ​Contact the supplier to wipe remotely​(The device serial number is required)
3. ​Physical key verification​(Some high-end models are equipped with U-shield)

But be careful, the reset operation will clear all program content. There was a guy who opened a bar that didn’t have backup materials. After resetting, he found that the opening video was gone, so he could only use his mobile phone to make do with the screen. So​Regular backup to mobile hard drive​​This habit can really save lives!

4. Advanced password setting gameplay

This is how experienced veterans play:

• ​Time-sharing dynamic password​(use password A to 8 am to 6 pm, use password B to other times)
• ​Regional permission management​(Total control password + partition operation password)
• ​Biometric Overlay​(Fingerprint/iris+password two-factor verification)

Have you heard of the sky of that internet celebrity mall? Their light show control system uses dynamic passwords and is automatically updated every half an hour. Once, the organizer had forgotten his new password, but he was so anxious that he looked for a technician 10 minutes before the show started - so he said​A good memory is not as good as a bad pen. You have to copy two key passwords in the safe.​！

5. My heartfelt words

When it comes to playing with LED screen passwords, there are only three sentences:​Regular replacement, graded pipe, physical defense​. Now some high-end models can achieve "three no protection" - no default password, no long-term static password, and no plain text storage. However, according to my observation, there are still 35% of equipment on the market that use old-fashioned fixed passwords, which is the same as not locking the door when going out.

Finally, I will throw away the hardcore data: the 2024 industry report shows that​ Turn on the two-factor authentication LED device, and the attack success rate dropped by 92%​​. Next time you set your password, remember to tie the verification on your phone, so don’t be troublesome. After all, no one wants to start dancing square dance in the middle of the night with a big screen?

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