My problem is that I am trying to decrypt the following ciphertext:
AWGNEYDTBSREAHGIDEIEEIHKIWABHPRCROIWSSBHTE OCSNASLAIGTTOTYIOBNANNOOCHENEHSADUAIEOSNTH TEOOAWUTOVTISNTVIFIHSNADVOGOREAPTBETSIT DCSNASAAHOOULITUREICBNOERSNETTNOITTNTSDEOO RERNINTOVTINTEFKGITPRCROEEIGREIGREHKFN HOCWHPDTOSREGTOUREINDIUATHCHIEOSN
I know this is English. I know that it was encrypted only once by substitution, mono-alphabet or transposition.
I checked the match index and I got: 0.06833754056978002 I also checked the frequency of the letter and I got:
T 11.02, E 10.59, O 10.16, I 9.74, N 8.47, S 6.77, A 6.35, R 5.93, H 5.93, G 3.38, D 3.38, C 3.38, U 2.54, B 2.54, W 2.11, V 1.69, P 1.69, K 1.27, F 1.27, Y 0.84, L 0.84.
So, I claim that this is transposition encryption. I'm right? I checked all combinations of Rail Transportation. I have not received anything reasonable. I checked all the Columnar Transposition combinations without changing the order. I have not received anything reasonable. I tested several combinations of columnar transposition with changing order. I have not received anything reasonable.
Do you have an idea how I can solve this interesting problem?