I've mentioned an idea in Phoronix forums[1] yesterday: Since most users won't bother comparing the entire signature (also applies to comparing md5/sha*/etc. hashes), it might be a good idea to map & display blocks of the sig as English words to the user.

Care must be taken to avoid similar-looking and similar-sounding (homophonic) words, but since there are >150k words in Oxford English Dictionary, so it should be possible to get 65k usable ones.

In fact, someone pointed out something like this already exists to a degree: [2]

A contrived visual example (suppose someone matches first two and last two segments!):

  Fake Linus Torvalds: ABAF 11C6 32D8 69AE E438 F74B 6211 AA3B 0041 1886
  Real Linus Torvalds: ABAF 11C6 5A29 70B1 30AB E3C4 79BE 3E43 0041 1886

With a word salad approach:

  Fake Linus Torvalds: lopsided crate threatening hydrant peep bumpy art work earth spurious
  Real Linus Torvalds: lopsided crate symptomatic equal kaput chunky kettle include earth spurious

Even with an even-spaced font, it's hard to confuse the two

(random words from [3])

[1] https://www.phoronix.com/forums/forum/phoronix/latest-phoron...

[2] https://github.com/bitcoin/bips/blob/master/bip-0039.mediawi...

[3] https://www.randomlists.com/random-words