Your zip or rar or encrypted form or whatever of the IP is directly derived from the original, and as such it is still subject to the same restrictions as the original. Derived material is protected in the same way as the original.
If you ROT13 a book, and upload one chapter, is that infringing? Answer: yes, because it is distribution of a work derived from a protected work. Does it matter if the original is recoverable? No. If the receiver of the ROT13 version doesn't know about ROT13, it's still infringing. If it's even technically impossible to recover the original (because it's part of a larger encrypted file, because you don't know the password/decryption key, ...), is it still infringing? Answer: yes.
If you ROT13 a book, and upload one chapter, is that infringing? Answer: yes, because it is distribution of a work derived from a protected work. Does it matter if the original is recoverable? No. If the receiver of the ROT13 version doesn't know about ROT13, it's still infringing. If it's even technically impossible to recover the original (because it's part of a larger encrypted file, because you don't know the password/decryption key, ...), is it still infringing? Answer: yes.