TIL: The concept of steganography which is the hiding of messages in plain sight. For example, Phyllis Latour Doyle (British spy) parachuted into France to spy on Nazis before D-day. She used knitting to record messages. history.howstuffworks.com Submitted by Geek_Nan t3_11d1afo on February 27, 2023 at 3:18 AM in todayilearned 55 comments 1,851
J_train13 t1_ja6gtty wrote on February 27, 2023 at 4:49 AM I love that the only reason I know what this is is from that one Doctor Who episode with MI6 Permalink 12
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