| Date | Grid | Clue | Author | Editor |
| Sat, Dec 17, 2022 | 43D | Like some hard-to-read messages | Christina Iverson and Tom Pepper | Shortz |
| Fri, Jun 12, 2020 | 25D | Needing a key, perhaps | Robyn Weintraub | Shortz |
| Sun, Oct 04, 2015 | 66A | In need of a cracker, perhaps | Jeremy Newton | Shortz |
| Mon, Apr 23, 2007 | 3D | In secret language | David Pringle | Shortz |
| Fri, Jan 07, 2005 | 45D | Requiring cracking, perhaps | Stella Daily and Bruce Venzke | Shortz |
| Sun, Oct 07, 2001 | 54A | Like something written in 21-Across | Patrick Berry | Shortz |
| Sun, Sep 09, 2001 | 15A | Like DNA | Harvey Estes and Nancy Salomon | Shortz |
| Tue, Jun 26, 2001 | 70A | Having secret marks, maybe | Stephen Windheim | Shortz |
| Sun, Dec 19, 1999 | 95D | Like many wartime messages | Frances Hansen | Shortz |
| Sat, Jul 04, 1998 | 25D | Unreadable | Harvey Estes | Shortz |