The cell phone jammer blocks the constant signal sent by the cell phone

For some people at the National Republican Party Congress in Cleveland, the choice of protective accessory was an AR-15 rifle casually hung on their shoulders. For Los Angeles-based artist and activist Tim Schwartz (Tim Schwartz), this is a discreet pouch made of matte silver ripstop fabric that can hold his phone.

cell phone jammer block the continuous signal sent by the cell phone-Schwartz said this feature is essential in unpredictable political events such as the Republican National Convention. Schwartz said: “I think it is wise for everyone to protect themselves when they don’t know what is going to happen.” He specifically pointed out: “You can easily turn on and off the phone.” If an interruption occurs, it can even be used retrospectively. This information: “The government can request records and show that you are in the area when there is a problem.”

The Electronic Frontier Foundation, a non-profit organization dedicated to protecting civil liberties in the digital world, advised protesters that although their mobile phones are a powerful tool for recording photos and videos, they also contain a lot of personal information, including contacts , Location and message history, email and private credentials. “Our life is on our equipment,” Schwartz said.

These high-frequency blocking bags (called Faraday cages) are easily used by a powerful group of people that Schwartz calls “technical elites”. Quartz reported on a $720 cash transport and RF sealing bag, and President Barack Obama traveled with a tent for this purpose. For RNC protesters looking for cheap DIY options, Schwartz, according to the instructions of Berlin-based artist Aram Bartholl, held “office hours” for the protesters at the Cleveland Space Museum to sew his own signal shielding mobile phone cases. Its meeting will be held today (July 19) and tomorrow from 1pm to 4pm.

Schwartz said this is a protective measure that non-protesters can also consider. He said: “It’s like the password is too long.” “This is one of the things we should do, but we will never be able to do it.” Schwartz provided the protesters with copper taffeta fabric, a sewing machine and Suggest. He said that his eighth-grade sewing home economics training is very suitable for this job, and pointed out that the most important step is to ensure that all the edges of the bag are folded and secured. This is the instruction on Aram Bartholl’s “Kill Your Phone” website. Information can be found on lessemf.com:

Cut 12 cm long strips from the anti-scroll fleece. Make small pieces of 50 x 12 cm, each piece into a bag. (That is, you get 2 rolls of 1 m long.) Fold the 50 x 12 cm piece into 25 x 12 cm, fold the long sides again, 1 cm on each side, and then secure them in place with a needle. Sew two straight seams left and right. Fold at least 2 times! Look for a paperclip or paperclip to close the bag. finished! Schwartz previously developed a mobile phone jammer tool for victims of the Haiti earthquake, which could find missing family members in 2010. Then, he “dipped into the dilemma of digital privacy” and worked with Fordham Law School’s Center for Law and Information Policy (CLIP) to research online privacy and coordinate with security.

In recent years, Schwartz has held seminars on digital data protection at schools such as the California Institute of the Arts and UCLA, such as “How to Become a Whistleblower,” partly in collaboration with the network-based data protection movement Cryptoparty. For the rest of this month, he will continue his work as an artist-in-residence at Spaces, where he will hold events such as the “Dark Web Treasure Hunt” to help people learn more about digital privacy.