| Clue | Source | Date |
|---|---|---|
| Cryptographic devices arbitrarily censored (8) | ||
| Converters to a new file format, perhaps | ||
| Cryptographers, often | Wall Street Journal | 02 Feb 2019 |
| Cryptographers, often | ||
| They have something to hide | ||
| Cryptographers, often | ||
| Cryptographers, perhaps | ||
| Cryptographers |