> When she obtained any military intelligence, she encoded it for transmitting by knitting using one-time codes hidden on a piece of silk that she used to tie up her hair; she would translate them using Morse code equipment.
it's unclear from the images in the shop but the code isn't the circuit diagram-ish things but a table in the middle, which reproduces this, an actual SOE silk code: http://www.jproc.ca/crypto/silkcode_chart_b.jpg
This is apparently a 'Worked Out Key' cipher, not a OTP as mentioned in the article, but both were in use due to Leo Marks https://en.wikipedia.org/wiki/Leo_Marks#:~:text=Developments....
(in fact, here's a photo of Leo with one of these code tables https://www.historynet.com/was-this-the-uks-worst-spy-failur... )
I liked this: "The patterns on the goods in this shop are designed to trigger Automated License Plate Readers, injecting junk data in to the systems used by the State and its contractors to monitor and track civilians and their locations."
Not that it makes his service any less incredible or admirable in my book.
https://en.wikipedia.org/wiki/Foreign_support_of_Finland_in_...
The actual quote from Phyllis was " I always carried knitting because my codes were on a piece of silk".
There's no need for knitting to be involved in the encoding. She had a message (unclear if it was a message she received or her own personal knowledge; likely her own knowledge from observing Nazi/German soldiers), and she had a silk with the code keys, and she had a transmission station.