At a time when the possibilities for attacks are increasing, link22 continues to launch solutions for enhanced security. We are proud to introduce Audio Diode to the Swedish market, a product designed to prevent eavesdropping through speakers.

Hackers have become increasingly sophisticated, with techniques that can convert speakers into microphones, allowing them to eavesdrop on conversations. The attacker achieves this by recording the signals that appear when a speaker membrane vibrates due to speech in the room (this evokes a signal traveling “backwards” in the sound cable). The recorded signals are then converted back to speech in the attacker's computer and the eavesdropping operation is successful. With Audio Diode, the user can ensure that speakers only operate in one direction, preventing sound signals from traveling backward. This prevents eavesdropping.

"We are proud to offer a solution like Audio Diode. It is a product that not only offers high security but also gives our customers peace of mind knowing that their talks are protected," says Daniel Lester, Business Area Manager at link22.

Anyone who regularly works with sensitive information and participates in digital meetings can benefit from Audio Diode. Authorities, who often handle confidential information, can ensure that their digital calls remain private and protected from eavesdropping. Similarly, law firms, constantly handling client information and legal discussions, can integrate Audio Diode to enhance their information security.

Eavesdropping through speakers is a real security risk for many businesses. Unprotected devices like headphones and speakers can be manipulated by attackers. Audio Diode prevents sound signals from traveling "backward" through the sound system, reducing the risk of eavesdropping through surrounding speakers.

Sound passing through Audio Diode goes through a low-pass filter, limiting the sound frequencies to those perceivable by the human ear. This prevents hackers from eavesdropping by sending high-frequency signals to an external hacking device.

Read more about Audio Diode here.

The Audio Diode allows sound signals to travel in only one direction. This means that sound signals cannot travel “backward”. The product thereby prevents hackers from manipulating a speaker/headphone to function as a microphone, capturing surrounding conversations.

The Swedish cybersecurity company link22 has strengthened its collaboration with British Glasswall to provide advanced protection against zero day threats (previously unknown threats). The partnership allows customers to combine link22's security solutions with Glasswall's Content Disarm and Reconstruction (CDR) function. link22 now delivers an enhanced defense against Zero Day attacks, a type of threat where traditional defensive mechanisms have been ineffective.

The simplest way to understand CDR is to compare it with traditional defense methods. Firewalls and filters work by identifying and blocking known threats, that is, viruses or software that have previously been classified as harmful. Threats generally become known after the first incident. Therefore, firewalls and filters do not protect against undiscovered threats, such as zero day attacks. CDR addresses this vulnerability by converting each file into a harmless file, regardless of whether the original file was harmful or not.

By dismantling, validating, cleaning, and then reconstructing files based on specifications for known and well-defined file types, CDR transforms passive security strategies into active ones. The implementation of this technology represents a significant improvement in the security of file transfers from, for example, open IT environments to isolated IT environments.

The seamless integration of Glasswall's CDR technology into link22's Cross Domain Solution makes it easy for existing and new customers to implement a higher level of security. The technology can be used for both the import and export of information, within and between security domains. The partnership enhances the capabilities of link22's Cross Domain Solutions.

link22 has customers with specific and complex requirements. To meet these, the company uses both internal expertise and partnerships with niche players such as Glasswall. They do what is necessary to deliver uncompromising security.