@SFOMuseum Twitter Posts Tagged cryptology This is SFO Museum's archive of the @SFOMuseum Twitter account. There are 3 posts . See all the tags or all the Twitter posts that have been archived so far.

See “Mathematics: Vintage and Modern” on display, post-security, in Terminal 2 and online at: https://t.co/loGSK6ryKu #MathAtSFO #Mathematics #Math #cryptology #cipher This tweet was posted on March 28, 2022.

Gears within the M-209 have prime-number ratios to prevent repetitive positions—with over one million positions before the key repeats. The M-209, however, is not fully secure, partly because its prime numbers are short. #MathAtSFO #Mathematics #Math #cryptology #cipher This tweet was posted on March 28, 2022.

During World War II, all sides used mechanical ciphers. The U.S. military’s M-209 portable crypto machine required users to encrypt text one letter at a time. By turning a crank, the scrambled message printed out on paper tape. #MathAtSFO #Math #cryptology #cipher This tweet was posted on March 28, 2022.