Please answer the following question: What type of details about david chaum  can be gathered from the following bio?  Bio: david lee chaum -lrb- born 1955 -rrb- is the inventor of many cryptographic protocols , as well as ecash and digicash . his 1981 paper , `` untraceable electronic mail , return addresses , and digital pseudonyms '' , laid the groundwork for the field of anonymous communications research .
Answer:
- website - residence - known for - birth date - name - image size - image - occupation