RSLogix 5000 (and Studio 5000) Source Protection is a security feature used to protect intellectual property by locking specific routines or Add-On Instructions (AOIs). While Rockwell Automation does not provide an official "decryption tool" to bypass these protections without a key, third-party methods exist to recover or remove protection when original keys are lost.
As the industry moves toward Studio 5000 and newer firmware (v30+), the "easy" methods of bypassing Source Protection have largely been mitigated. Rockwell has introduced: rslogix 5000 source protection decryption tool
Keys are stored locally in a file named sk.dat (Source Key file). RSLogix 5000 (and Studio 5000) Source Protection is
Extract the hash from the .ACD file. The protection data is stored in a LogixSourceProtection stream. Command: python extract_hash.py your_file.ACD rslogix 5000 source protection decryption tool