Category Archives: usable security

Montana trip (Part 2: ACRM, Montana State, and Awards Ceremony)

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The American Computer and Robotics Museum sponsored the Stibitz-Wilson Awards, so they invited all the 2025 award honorees and guests for a guided tour of the museum, given by the museum president, Barbara Keremedjiev. Barbara was a very knowledgeable tour guide who talked about the museum collection with great enthusiasm and passion. I was excited to see some familiar computers and toys from my childhood in the collection. My elementary school had a PET. We had an early PC, a luggable, and a Sinclair at home. My high school had Apples and a lab of original Macs. I also had a Simon game, which I used as part of a science fair project.

After the museum tour we went to Montana State University for lunch with the new university president, Brock Tessman (he’s on the left side of the bottom photo).

We spent some time exploring Main Street in Bozeman, which had a banner across the street advertising the awards ceremony. There were lots of bars, outdoor stores, tshirt shops, and some ice cream shops and nicer restaurants. While we were wandering around I checked Google maps for the nearest fabric store and discovered one about 300 feet from where we were standing — I hadn’t noticed it because there was scaffolding in front of it for some construction. So I declared a fabric emergency and we immediately headed to the fabric store. It was a good sized store with a lot of quilting fabric. I was impressed that they had commissioned their own Yellowstone batik fabrics in several color ways. So I had to buy some as a souvenir.

The awards ceremony was held that evening at the Ellen Theater on Main Street. I wore my passwords ball gown and Chuck wore his matching passwords tie. Each honoree was invited to give a 15-minute presentation about their research. We had to send our slides in advance and the museum director was a bit concerned when I sent her 65 slides for a 15-minute talk. So we compromised on 50 slides, and I did finish my presentation in just under 15 minutes, briefly discussing my work on passwords, privacy notice and choice, and the art of privacy. It was fun hearing from the other honorees as well. Yasmin Kafai and Mitch Resnick both talked about their work teaching creative computing skills to children. They were both involved in the development of the Scratch programming language (which was very popular with my children). Serge Belongie and Pietro Perona helped build Visipedia, which underpins iNaturalist and the Merlin Bird ID apps.

Next up…. Part 3: Yellowstone

Alana dresses

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Last September I bought my first Sinclair pattern and sewed an Alana dress. I have since sewn two more (and there will probably be more) and several other Sinclair patterns. I’ve found the Sinclair patterns to be well drafted and pretty straightforward to understand. They can be downloaded as PDFs and printed on a home printer, printed in large format at a copy shop, or projected.

I chose Alana as my first pattern mostly because I liked the pockets. I continue to love the pocket style, where the pockets are anchored by two princess seams. I also liked the neckline that used a facing instead of a binding or band.

I obsessed over what fabric to use, and continuing with my privacy research related theme, I selected fabric with eyes on it — evil eye blue by Laura May. I got the same fabric in the small size for the sleeves. I had both printed on Spooflower modern jersey.

Then I printed out the PDF layer for the size 4 petite pattern on the laser printer at work and spent about an hour taping it together and cutting out all the paper pattern pieces. Then I laid all my cutting mats out on the hallway floor and laid out the fabric as shown in the pattern instructions. I quickly realized that I didn’t have enough fabric for that sort of layout. Puzzled, I looked on the Sinclair website for where to ask questions, and discovered the Sinclair Patterns Group on Facebook. This FB group is a great resource for sewing Sinclair patterns. I found you can easily search for the name of a pattern and find lots of photos of garments other people have made with that pattern, including tips on fabric selection and alterations. You can also post questions or show off your own makes. In any case I soon learned that the layout in the instructions is just a suggestion and may not work depending on the fabric width, garment size, etc. I figured out how to fold the fabric to cut it and get it all in. I also learned from the FB group about a YouTube video tutorial for making the Alana dress.

I used large washers as fabric weights and used my rotary cutter to cut out the fabric. Then I followed the instructions to sew the dress. I selected the regular neckline, long sleeves, and knee-length options. On the advice of the video tutorial I extended the length of the front facing so that it would fall below the bust line. I used a very narrow zigzag stitch for all of the seams and a medium zigzag to finish the seam edges. I finished the sleeve and bottom hems with HeatNBond Soft Stretch and zigzagged over the edges.

When I tried on the dress it looked OK, but the waist is not designed to be fitted, and it looked a little baggy on me. Indeed, the pattern explains that there is about three inches of ease at the waist. So I decided to take the dress in at the sides and the back princess seams to remove most of that ease. The dress looked much better on me without the ease.

I made my second Alana dress in December using a rich purple scuba suede fabric. The fabric is soft, stretchy, washable, and pretty easy to sew. I used a lighter ITY fabric for the front and back facings and extended both of them below the bust. I thought about using a lighter fabric for the inside of the pockets but decided to try the pockets entirely in scuba suede, and they worked out fine. A line of top stitching across the top of the pockets might have been helpful, but it is ok without. I did not bother stitching over the seam edges. Once again I ended up removing the ease. Months later the fabric is holding up pretty well after many wearings and washings, although it is showing some slight signs of pilling.

My third Alana dress was another dress in Spoonflower modern jersey. This time I removed the ease in the pattern when I cut it. Cutting out this one took a while because I obsessed over the fabric placement. This was the third version of my bad passwords dress (there’s a whole story behind it), and this time I wanted to have long sleeves and pockets.

New password dress with sleeves and pockets

And see the original passwords dress below

Lorrie wearing password dress at Privacy@Scale, photo by Adam Mason

CUPS of SOUPS

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After sewing mostly quilts for a while, I was inspired to sew a dress again last summer (2022) because I wanted a dress to wear to the Symposium On Usable Privacy and Security (SOUPS) 2022, a conference that I started in 2005 and is still going strong. I thought it would be fun to have a dress that had soup on it. I thought about a soup-can dress channeling Andy Warhol, but eventually settled on a bright noodle soup pattern called grandma’s recipe, designed by Daniela Friedenthal and available at spooflower.com. I had the fabric printed on modern jersey, and then tried to figure out how to sew it.

Sidebar 1: I love Spoonflower modern jersey! It is one of the best polyester jersey’s I have found with a feel similar to cotton, but brighter colors. It is similar to double-brushed polyester (DBP) but has a little bit more body than most of the DPBs I’ve used. The main downside is it is about 4 or 5 times more expensive than DBP and only available for custom printing, not colored solids.

My previous me-made dresses were very simple, sewn from two pieces of fabric with no pockets. This time I wanted a half-circle skater dress with pockets and some better finishing details. I started reading sewing blogs and learned how to sew side-seam pockets and create neck bands and bindings and make smooth knit hems with Soft Stretch hem tape. I reverse engineered some dresses from my closet and drafted a pattern, trying to include enough ease so I wouldn’t need a zipper.

Sidebar 2: I also love Heatnbond Softstretch for knit hems of all sorts. I fuse the tape to the edge of the hem, turn under the hem and press using the paper backing edge as a guide, then peel back the paper and fuse the hem in place, then zigzag over the edge. I’ve used this on dress, shirt, sleeve, and cardigan hems with great results. It even works on curves — you just have to nudge the paper backing around the curve as you press it. I now keep a couple of rolls around at all times so I don’t run out in the middle of a project!

The finished dress worked pretty well. The waist ended up a bit looser than I wanted and the pockets pulled the waist down a bit when I put stuff in them. But a sweater easily hides the imperfections. It is a fairly striking looking dress because of the unique fabric, and I have had total strangers comment on it.

While I wasn’t 100% satisfied with the SOUPS dress, I decided it was good enough that I wasn’t going to remake it. But I wanted to improve my pattern and give it another go. So adjusted the fit of the waist and the pockets a bit and sewed the dress again, this time in soft blue vintage tea cups fabric designed by Cecilia Mok on spoonflower.com. I chose cups because the name of my lab at CMU is the CyLab Usable Privacy and Security (CUPS) Laboratory. I also went on a quest to find a spoon pendant I could wear with both dresses. Most of the spoons I could find online were either too tiny or too big, or were designed for functional use as drug paraphernalia. I eventually bought a 25 pack of spoon charms for less than $10.

The CUPS dress came out considerably better, but in my further reading about sewing skater dresses, I discovered a free PDF skater dress pattern from Sinclair Patterns. Then I discovered Sinclair’s other patterns and one thing led to another. Watch for future blog posts….