| Titels | Prof. dr. |
| Initials | R.J.F. |
| Main position | Groepsleider Cryptology CWI, Hoogleraar UL |
| Disciplines | Logic, set theory and arithmetic |
| Theoretical computer science | |
| Algebra, group theory | |
| Chair | Cryptologie |
| Domain | Natural Sciences and Engineering |
| Membership | Member |
| Since | 2013 |
| Member of Natural Sciences and Engineering | |
| Personal website | |
| Research/publications |
Ronald Cramer, The Cramer-Shoup crypto system that he and his American colleague Victor Shoup published was the first practical system resistant to active attacks. The system became an international standard. Cramer also designed a system for secure collaboration between parties that do not trust each other. He has developed new, ground-breaking applications for classical mathematics in cryptography. Cramer was one of the first members of The Young Academy.