Reading the Crypto Classics: Chaum: “Untraceable Electronic Mail, Return Addresses, and Digital Pseudonyms”

03.06.2020 10:00-11:00

Speaker: Samed Düzlü, TU Darmstadt, QPC Group | Location: Online

Organizer: Christian Janson


This talk is the second one in the seminar series „Reading the Crypto Classics“ for the very special summer term 2020. The idea of this seminar is to jointly read classical milestone papers in the area of cryptography, to discuss their impact and understand their relevance for current research areas. The seminar is running as an Oberseminar, but at the same time meant to be a joint reading group seminar of the CROSSING Special Interest Group on Advanced Cryptography with all interested CROSSING members being invited to participate.

This issue will cover the paper
Chaum: “Untraceable Electronic Mail, Return Addresses, and Digital Pseudonyms” (Communications of the ACM 1981) (DOI: 10.1145/358549.358563)
with the following abstract:

„A technique based on public key cryptography is presented that allows an electronic mail system to hide who a participant communicates with as well as the content of the communication--in spite of an unsecured underlying telecommunication system. The technique does not require a universally trusted authority. One correspondent can remain anonymous to a second, while allowing the second to respond via an untraceable return address.

The technique can also be used to form rosters of untraceable digital pseudonyms from selected applications. Applicants retain the exclusive ability to form digital signatures corresponding to their pseudonyms. Elections in which any interested party can verify that the ballots have been properly counted are possible if anonymously mailed ballots are signed with pseudonyms from a roster of registered voters. Another use allows an individual to correspond with a record-keeping organization under a unique pseudonym which appears in a roster of acceptable clients.“

Further information about the location

The seminar takes place in a virtual format using BigBlueButton. Please join us using the provided link in your favorite browser. When joining, please select that you want to participate with „microphone“. Then you connect to the server performing an echo-test. If you hear yourself correctly then please choose the option „thumbs-up“. Then you have successfully joined the seminar and you are automatically muted. Please keep this setting to provide everyone a good sound quality unless you have a question. Then you can please unmute yourself and ask a question. This seminar is still meant to be interactive.

Further information