no company will ever plant a backdoor in it's proprietary software

from wikipedia

At one point, Lotus negotiated an agreement with the NSA that allowed export of a version that supported stronger keys with 64 bits, but 24 of the bits were encrypted with a special key and included in the message to provide a "workload reduction factor" for the NSA. The net effect of this was that users of Notes outside of the US had stronger protection against private sector industrial espionage, but no additional protection against spying by the US government. This implementation was not a secret - in fact it was widely announced - but with some justification many people do consider it to be a backdoor.