Office hours

My office hours are posted on the CS 458/658 course syllabus.


E-mail me at It's by far the easiest way to reach me!

Secure contact

The best way to get in touch with me securely is via Wire. I'm @errorinn and my primary device fingerprint is a6 b5 02 07 07 4e 1f 33 4d 53 be 65 f5 36 6e 01 8b a5 10 06 82 3c 82 3f 9e c6 7a 6c 47 5d 48 dc.

Get in touch via email or Twitter DM for my Signal number.

If you must, my PGP key is

In person / by phone

My office is in the CrySP Lab (DC3332). Our phone extension is x31337 but don't expect an answer unless you notify me that you'll be calling beforehand.

Snail mail

Erinn Atwater
David R. Cheriton School of Computer Science
University of Waterloo 200 University Avenue West
Waterloo, ON
Canada N2L 3G1


My Bitcoin address is: 1CaTYL5k1nT84DFEGicsKBQEckocEn39WQ