Related Clues:
- Program listing?
- Cracker's concern
- Write software
- Software basis
- What a cracksman cracks
- Bar closing?
- Encryption or set of rules
- Secure in metal box?
- Metal box for security
- Cryptogram or set of standards
- Metal container for valuables
- Computer instructions
- Secure in metal box
- Metal case for storing valuables
- Strong metal box to store valuables