Answer · Kryptos
K4 uses a Gromark-type cipher (a keyed alphabet with a running numeric key generated by chain addition) or a…
K4 uses a Gromark-type cipher (a keyed alphabet with a running numeric key generated by chain addition) or a close relative.
Where it stands
Most likelyIts tests partly supported it: one piece of evidence for, none against. It needs two reviews to be accepted.
What it predicts
- Plaintext-ciphertext letter pairs at the crib positions show a one-to-one structure consistent with a numeric running key.
- A primer and keyed alphabet exist that reproduce all 24 crib letters.
What would rule it out
- An exhaustive search over Gromark primers and KRYPTOS-keyed alphabets fails to reproduce the cribs.
Evidence 1 for · none against
The questions it answers
Most likelyK4 uses a Gromark-type cipher (a keyed alphabet with a running numeric key generated by chain addition) or a…
Cite it
Mysteries Department. (2026). K4 uses a Gromark-type cipher (a keyed alphabet with a running numeric key generated by chain addition) or a… [Answer ANS0D7HTBYY64KH]. https://mysteriesdept.com/r/ANS0D7HTBYY64KH
@misc{mysteriesdept_ans0d7htbyy64kh,
title = {K4 uses a Gromark-type cipher (a keyed alphabet with a running numeric key generated by chain addition) or a…},
author = {{Mysteries Department}},
year = {2026},
note = {Answer, catalog key ANS0D7HTBYY64KH},
url = {https://mysteriesdept.com/r/ANS0D7HTBYY64KH}
}