| Programmer's creation | 25 |
| Programmer's concern | 24 |
| Word with Morse or area | 23 |
| Word with fire or area | 22 |
| What programmers write | 22 |
| The "C" in U.P.C. | 27 |
| Programmers' writing | 24 |
| Medium for secret messages | 26 |
| It takes brains to crack it | 27 |
| Genetic or dress follower | 25 |
| Cryptologist's interest | 27 |
| Contractor's concern | 24 |
| Camouflaged communication | 25 |
| Be a computer programmer | 24 |
| Write lines professionally | 26 |
| Word with bar or color | 22 |
| Word preceding various colors | 29 |
| Word after bar or area | 22 |
| What a spy may write in | 23 |
| Web developer's output | 26 |
| The "C" in UPC | 24 |
| System of secret symbols | 24 |
| Spy's writing, perhaps | 26 |
| Software developer output | 25 |
| Semaphore signals, e.g. | 23 |
| Programmer's work product | 29 |
| Problem for a cracker? | 22 |
| Pearl Jam "No ___" | 28 |
| Output from some engineers | 26 |
| It may be cracked by a spy | 26 |
| Cryptographers break it | 23 |
| Cryptographer's secret | 26 |
| Computer language, e.g. | 23 |
| Bottom numbers on an envelope | 29 |
| "The Da Vinci ___" | 28 |
| 'The Da Vinci ' | 23 |
| --- blue (medical emergency) | 28 |
| Like many wartime messages | 26 |
| Written in a secret language | 28 |
| Requiring cracking, perhaps | 27 |
| Put into dots and dashes | 24 |
| Marked for identification | 25 |
| Like U.S.A.F. messages | 22 |
| Like some wartime messages | 26 |
| Like some secret messages | 25 |
| Having secret marks, maybe | 26 |
| Encrypted, as a message | 23 |
| Renegade, for Barack Obama | 26 |
| Manhattan Project, e.g. | 23 |
| Operation Overlord, e.g. | 24 |
| Operation Desert Fox, e.g. | 26 |
| Alias for a secret agent | 24 |
| Official emergency status | 25 |
| Official emergency level | 24 |
| They're sometimes cracked | 29 |
| Cryptographers' creations | 29 |
| Things broken by the C.I.A. | 27 |
| Regulations for builders | 24 |
| Programmers' output | 23 |
| Features of secret messages | 27 |
| Cryptographer's study | 25 |
| Cryptographer's creations | 29 |
| Crackers may be used on them | 28 |
| Buildings often have them | 25 |
| Quire of manuscript pages | 25 |
| Leonardo manuscript, say | 24 |
| Ancient manuscript volume | 25 |
| Fish-derived supplement | 23 |
| North Atlantic food fishes | 26 |
| They come with balances due | 27 |
| Soft-rayed food fishes | 22 |
| New England food staples | 24 |
| Cape ___ (saltbox homes) | 24 |
| Buffalo Bill's surname | 26 |
| Buffalo Bill's last name | 28 |
| Buffalo Bill, formally | 22 |
| Buffalo Bill of the Wild West | 29 |
| "Agent ___ Banks" | 27 |
| Wyoming town near Yellowstone | 29 |
| Wyoming city near Yellowstone | 29 |
| William of the Wild West | 24 |
| Showman Bill: 1846-1917 | 23 |
| R&B singer Chesnutt | 23 |
| Buffalo Bill: Will ___ | 22 |
| "Buffalo" Bill ___ | 28 |
| "Buffalo" Bill | 24 |
| British miler Sebastian | 23 |
| College in Cedar Rapids | 23 |
| College in Cedar Rapids, Iowa | 29 |
| Country singer David Allan __ | 29 |
| British runner Sebastian | 24 |
| Sebastian of track fame | 23 |
| Scotland's Glen ___ | 23 |
| Running star Sebastian | 22 |
| Running rival of Ovett | 22 |
| Renowned British runner | 23 |
| Record-setter Sebastian | 23 |
| Producer-director Fred ___ | 26 |
| Olympic runner Sebastian | 24 |
| Iowa college since 1851 | 23 |