"Does 17 U.S.C. §1201(a)(1) or (a)(2) prevent providing information or instructions on how to circumvent technological measures?"
Example: Harry Hack writes a program to decrypt and copy information from DVD disks. Harry publishes the source code (not the executable) on his web site. Pete Pirate downloads the source code, compiles it, and uses the program to decrypt and "rip" the DVD to make copies.