re clipper considered harmful restated and amplified in article wcs apr rainier att com wcs anchor ho att com bill stewart writes it is still easy to conceal super encryption at least until the inquisitors get ahold of the k key which can take a while presumably not in near real time worst case in which the escrow agencies provide the u key to the local cops still only gets one side of the conversation per warrant unless the same key is used for both directions which i suppose the capstone version of the chip will probably insist on i was under the impression from reading denning s description of the clipper s operation that the same session key is used in both directions for encrypting the message text but that each chip uses it s own key for encrypting the session key into the law enforcement field so you only need to know the u key for one of the phones involved to decrypt the messages in both directions
