Smart criminals will use strong encryption anyway and won't give the passwords to law enforcement both for data at rest and sent over the Internet.
I'm encrypting my disk now, but I'll give the password to police if they have a search warrant. I'm encrypting so if somebody steals my computer they won't read my data. I think that almost everybody is like me.
Weakening that encryption doesn't help me and doesn't help investigators. Sure, seeing strong encryption over the wire will ring alarms and identify sender and recipient. That works if they actually decrypt all the data sent over the Internet. The workaround for the tenaciuos criminals will be steganography. Narrower band but good enough in most cases. All that effort and damage to honest citizens for nothing.
I'm encrypting my disk now, but I'll give the password to police if they have a search warrant. I'm encrypting so if somebody steals my computer they won't read my data. I think that almost everybody is like me.
Weakening that encryption doesn't help me and doesn't help investigators. Sure, seeing strong encryption over the wire will ring alarms and identify sender and recipient. That works if they actually decrypt all the data sent over the Internet. The workaround for the tenaciuos criminals will be steganography. Narrower band but good enough in most cases. All that effort and damage to honest citizens for nothing.