There isn't one really - if they had access to it the same logistical issues would come up no matter how much they pinky promise not to abuse it. The more it sp

There isn't one really - if they had access to it the same logistical issues would come up no matter how much they pinky promise not to abuse it. The more it spreads the more vulnerable it is The only way key escrow would be remotely trustworthy would be if there were "hostages" to provide an intrinsic punishment for their failures or stonewalling of transparency.