2 TECHNOLOGY BACKGROUNDER Safe from interception The SDW 5000 Series is one of the most secure solutions of its type available today: It uses advanced security protocols to ensure that business conversations remain confidential. Not only is it fully compliant with the high standards demanded by the DECT Security certification, but it exceeds these by adding a further tier of protection to the pairing process between the base station and headset. The patent-pending Protected Pairing solution which transfers sensitive pairing data via the charging terminal of the SDW 5000 base station helps to defend one of the most significant points of vulnerability. The SDW 5000 Series is a professional communication and collaboration hub that provides enhanced security features in the office. Protected Pairing – Security above and beyond the standard Sennheiser’s SDW 5000 Series has a Protected Pairing process that ensures its superior security. When pairing a headset to the base station for the first time, the SDW 5000 requires the transfer of pairing data (or the Master Security Key) using a physical connection via the charging terminals. This differs from other solutions that allow pairing ‘over the air’. Instead, a Sennheiser headset needs to be docked into a Sennheiser base station, so that the registration and security bindings can be established. This makes it virtually impossible for a third party to ‘sniff’ or intercept the pairing data from a remote location. For each headset paired to a base station, a unique Master Security Key has to be generated in this way. As the Master Security Key is stored in the devices and never transmitted ‘over the air’, this feature provides best in class security against any kind of unauthorized access. Furthermore, this pairing process uses an incredibly high level of encryption during authentication - AES-128-bitkeys, double the 64-bit keys usually required for the DECT Security certification (known as step A). By having implemented this enhanced algorithm, the SDW 5000 Series has reached step B in the defined DECT Security levels making it even more secure than DECT products that have only implemented step A. Keeping every conversation confidential The SDW 5000 Series has been validated by an independent accredited test laboratory as being fully compliant with the comprehensive security features required by DECT Security Certification. Per call authentication ensures that the headset and base station authenticate each other prior to each and every call. While this authentication takes place over the air, it is important to note that Sennheiser’s Protected Pairing solution ensures that the Master Security Key that is needed to retrieve the data is virtually impossible to obtain without physical access. As a result, the risk of authentication data being ‘sniffed’ is minimized. When calls are in progress, a DECT standard encryption algorithm using 64-bit keys is used to encrypt voice data in both directions using Derived Cipher Keys. The first Derived Cipher Key is generated by the Master Security Key. This ‘early encryption’ process happens before any data is exchanged and cannot be bypassed, preventing passive eavesdropping. Furthermore, the SDW 5000 Series has a re-keying procedure that continuously renews the 64-bit Derived Cipher Keys every minute during a call - an additional safeguard against brute force attempts to crack the ciphering.
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