This sounds similar to the PX1000 story: https://www.cryptomuseum.com/crypto/philips/px1000/nsa.htm https://www.cryptomuseum.com/crypto/philips/px1000/nsa.htm

This sounds similar to the PX1000 story: https://www.cryptomuseum.com/crypto/philips/px1000/nsa.htm https://www.cryptomuseum.com/crypto/philips/px1000/nsa.htm and https://www.vpro.nl/argos/lees/nieuws/2020/cryptoleaks-in-the-netherlands-former-philips-top-cryptographer-admits-to-compromising-encryption-devices.html https://www.vpro.nl/argos/lees/nieuws/2020/cryptoleaks-in-th... PX-1000 was a handheld message terminal, also known as a pocket telex, developed in 1980 by Text Lite in Amsterdam (Netherlands) and sold worldwide by Philips and others. Some versions of it had built-in encryption capability. In the initial version, the DES algorithm was used, but this was later replaced by another algorithm at the request of the US National Security Agency (NSA).