Hacker: Turn off beauty filter for female anchors during live broadcast

The key is to understand the difference between a mobile phone and a QR code.

He can understand using a QR code to control a mobile phone, after all, a Trojan virus can be hidden in a QR code.

However, it is too mysterious to control a mobile phone by shining a laser pen.

Su Yang smiled and explained: "Our mobile phones all have voice assistants, such as Xiaomi's 'Xiao Ai' and Apple's 'Siri'. And this laser pen in my hand has been specially modified to send commands to the mobile phone's voice assistant remotely, open the mobile phone's application, and even control smart home devices."

Su Yang paused and asked, "Do you believe it?"

"I believe it!"

Unexpectedly, the audience answered in unison that they believed it.

"Hey, how can you do this? You believe everything I say? You can't do this." Su Yang pretended to be angry and said, "This will not be effective. I'll give you another chance. Now, do you believe that I can remotely open your mobile phones with just a laser pen?"

"I don't believe it!"

This time, the audience learned to be "smart".

"Haha!" There was laughter at the same time.

"That's right." Su Yang nodded with satisfaction, and then said, "Don't believe it? Well, who doesn't believe it and is willing to try it?"

"Hua La La!" In the audience, nearly one-third of the audience raised their hands, and they all wanted to experience it for themselves.

Even Guo Qilin and Qi Wei raised their hands.

"Okay, since everyone is so enthusiastic, please ask our staff to bring the props to the stage."

After speaking, a staff member pushed a table and walked onto the stage.

On the table, there was a laser pen, a laser driver, a loudspeaker, and a telephoto lens.

While Su Yang introduced these props to the audience, he signaled the staff to assemble them.

The staff connected the laser pen to the laser driver, then connected the laser driver to the loudspeaker, and finally connected the loudspeaker to a laptop.

A data cable connected all the devices together.

After the assembly was completed, the staff turned on the switch of the laser pen, and a beam of green laser shot out from the laser pen.

"Please invite a friend from the audience. You don't need to go on stage. Just sit in your seat and raise your mobile phone... Just the big brother in yellow clothes behind." Su Yang said.

In the back row of the audience, a tall man in yellow clothes stood up.

"Please raise your mobile phone, yes, that's it." Su Yang said.

The man raised his mobile phone according to Su Yang's instructions.

It was an Apple mobile phone.

"Let's do a simple test first to see if we can wake up 'Siri'." Su Yang said, and then signaled the staff on the stage to shout:

"Hey, Siri!"

The man's mobile phone did not respond at all.

He was about 40 meters away from the stage, and the voices of the staff could not reach his phone at all.

"Hey, Siri!"

"Siri!"

"Siri!"

The staff shouted several times in succession, but there was still no response.

"Okay, there is no response if you shout directly like this. Now, let's try to use a laser pen to wake up 'Siri'." Su Yang said.

The staff turned on the laser pen, and a green laser beam passed through a distance of 40 meters and accurately shone on the screen of the yellow-clothed man's phone.

"Please turn on the camera and take a close-up of the phone." Su Yang said.

A camera above the audience moved to the top of the yellow-clothed man's head, pointed the lens at his phone, and projected the picture onto the big screen.

All the audience could clearly see that a green light spot appeared on the man's phone screen at the position of the microphone.

"Do you see that green light?" Su Yang asked, "Now, please ask the staff to shout: 'Hey, Siri'."

The staff shouted: "Hey, Siri!"

A magical scene appeared.

Forty meters away, the Apple phone in the yellow-clothed man's hand suddenly lit up, and then the voice of "Siri" came from the phone:

"I'm here!"

"Wow!" The yellow-clothed man's pupils dilated and looked at the phone in disbelief.

This is too magical.

It's not over yet.

"Open the album." The staff continued.

"Open the album for you." "S

iri" replied.

Then, the photo album of the mobile phone opened automatically.

"Wow!"

The audience exclaimed.

It really works.

What kind of black technology is this?

"Pah pah pah!"

Then there was warm applause.

"I'll try it," Saning shouted loudly. He took his Xiaomi mobile phone, walked off the stage and came to the audience.

Saning held up his mobile phone high.

Everyone's eyes were focused on his mobile phone.

"Xiao Ai classmate!" The staff on the stage shouted to the microphone.

The screen of the mobile phone in Saning's hand suddenly lit up, and then the voice of "Xiao Ai classmate" came from the mobile phone: "I'm here."

"Open the phone." The staff continued.

I saw that the mobile phone in Saning's hand was automatically unlocked.

"Open WeChat." The staff said again.

WeChat opened automatically...

"Okay, okay, it's OK. "Saning quickly closed WeChat, he was afraid that if he continued like this, the information in WeChat would be exposed.

Wow~~

A laser pen can actually wake up the voice assistant of the mobile phone.

Incredible.

"Little Boy, what is the principle?" Saning asked curiously.

The audience also wanted to know the answer.

"The principle is actually very simple," Su Yang explained, "We first convert the sound into a light signal and input it into the laser pen, and then use the laser pen to shine the light signal onto the screen of the mobile phone, or more precisely, onto the microphone of the mobile phone."

"You may not know that the microphone can not only receive sound waves, but also respond to light sources, such as lasers, just like responding to sound waves. This feature can be used to "inject" sound into the microphone by modulating the intensity of the laser. "

Su Yang explained the principle very clearly, but the audience and guests still found it amazing.

Next, the audience took out their mobile phones and asked Su Yang to test it.

There are all kinds of mobile phones, Huawei, OPPO, vivo mobile phones can all wake up the voice assistant in the mobile phone with a laser pen.

This is amazing.

"Wow, I don't know how powerful it is!"

"This is not technology, this is magic!"

"Too amazing!"

"Boss 'LittleBoy', how did you come up with this method? !"

"It's a bit scary, who will dare to use the voice assistant on the mobile phone in the future?"

"I will turn off the voice assistant on my mobile phone now!"

...

The barrage in the live broadcast room emerged like a tide.