- Modular Arithmetic and Trap Door Ciphers (RSA)
- A Tour of Public Key Cryptography (and of Number Theory) (Merkle’s Puzzles, Diffie-Hellman, RSA, Massey-Omura, etc.) [html] [abs]

- AMS Special Session on Mathematics and Mathematics Education in Fiber Arts (January 2005 Joint Mathematics Meetings) [web page]
- Blackwork Embroidery and Algorithms for Maze Traversals (joint work with Lana Holden) [slideshare] [abs]
- How to Paint Your Way out of a Maze (joint work with Lana Holden) [slideshare] [abs]
- Two versions of a talk on math and art (joint work with Lana Holden):
- Braids, Cables, and Cells: An Interesting Intersection of Mathematics, Computer Science, and Art (more general examples) [slideshare] [abs]
- Braids, Cables, and Cells: An Intersection of Mathematics, Computer Science, and Fiber Arts (knitting and crochet examples) [slideshare] [abs]

- Braids, Cables, and Cells II: Representing Art and Craft with Mathematics and Computer Science (joint work with Lana Holden) [slideshare] [abs]
- Stitching Graphs and Painting Mazes: Problems in Generalizations of Eulerian Walks (joint work with Lana Holden) [slideshare] [abs]
- Granny’s Not So Square, After All: Hyperbolic Tilings with Truly Hyperbolic Crochet Motifs (joint work with Lana Holden) [slideshare] [abs]