Cipher test page
Enjoy a good mystery? Click here.
Directions: Type or paste ciphertext into the Cipher box. Click on the Test button.
The results appear in the lower box.
For further information on the Normor test and how it is used, see my article on this site:
NOTE: I've discovered that Chrome and Safari do not interpret the Normor code on this page
Firefox, Opera and Internet Explorer do. The difference in the final number is quite small
and probably not important,
but be aware of the problem and use another browser if you think it necessary.
For lists of the most frequent 1-word and 2-word words and phrases in English, download the zip file here:
Frequent Words and Phrases
Here's another file you might find useful. It shows the relative frequency of each square in the two ciphertext polybius squares in the Foursquare cipher. The frequencies are based on
approximately 5000 solutions of ACA English-language cons - (non-overlapping digraphs):
Foursquare cell frequencies
For my blog OnWords, click here: OnWords
HOME (Click to download the free word game ACK !!)
Links to other ACA members' cipher tools pages:
Since the ACA modified its website, basic information about simple substitution ciphers is no longer available to non-members. Here's an explanation to the four basic keying types, K1 - K4. In a K1 cipher the plaintext alphabet is mixed with a keyword or phrase but the ciphertext is the straight alphabet. In a K2 only the ciphertext alphabet is mixed. In a K3 both are mixed with the same key. In a K4 both are mixed, but with different keys. In all cases, the keyed alphabet may be shifted. The ACA does not allow a letter to stand for itself, so the alphabets will be shifted to eliminate any such case. See the examples below.
K1: pt XYZSCRAMBLEDFGHIJKNOPQTUVW
K1: ct ABCDEFGHIJKLMNOPQRSTUVWXYZ
K2: pt ABCDEFGHIJKLMNOPQRSTUVWXYZ
K2: ct XYZSCRAMBLEDFGHIJKNOPQTUVW
K3: pt XYZSCRAMBLEDFGHIJKNOPQTUVW
K3: ct SCRAMBLEDFGHIJKNOPQTUVWXYZ
K4: pt VWXYZSCRAMBLEDFGHIJKNOPQTU
K4: ct KEYWORDABCFGHIJLMNPQSTUVXZ