Answer:

CODE

AnswerCrossword Clue
CODEWord with bar or dress
CODECryptogram
CODEZip ...
CODEOmert... or bushido
CODEWord with 16A
CODEOmerta or bushido
CODE... of silence (what a snitch breaks)
CODE"The Da Vinci ..."
CODEMorse invention
CODESomething cracked?
CODESomething cracked
CODESet of standards
CODEIT instructions
CODEProgrammer's creation
CODEHard-to-read writing
CODECracking target
CODEIt might be genetic
CODEMorse ...
CODESecret language
CODECracker's target
CODEIt may be cracked by a spy
CODEMorse's creation
CODEMole's aid
CODEProblem for a cracker?
CODESet of principles
CODEMorse creation
CODEProgrammer's output
CODEUPC part
CODEIt can't be understood until it's broken
CODEBar closing?
CODEProgrammers' writing
CODEWhat a cryptographer cracks
CODECipher
CODEBar or airport follower
CODEIt can be broken
CODEMorse or semaphore
CODECypher
CODEPart of ASCII
CODEIt follows zip or bar
CODE... Red Virus (computer affliction of 2001)