https://www.cryptomuseum.com/crypto/philips/px1000/index.htm https://www.cryptomuseum.com/crypto/philips/px1000/index.htm "Initially the device offered strong

https://www.cryptomuseum.com/crypto/philips/px1000/index.htm https://www.cryptomuseum.com/crypto/philips/px1000/index.htm "Initially the device offered strong DES encryption, but this was replaced in 1984 by an NSA-supplied alternative algorithm." "The NSA bought 12,000 DES-based PX-1000 units, along with 50 PXP-40 printers and 20,000 ROMs that had already been produced, for the total sum of NLG 16.6 million (EUR 7.5 million)."