Home
Encrypt / Decrypt
Md5 Decryption
Md4 Decryption
Sha1 Decryption
Sha256 Decryption
Sha384 Decryption
Sha512 Decryption
Ntlm Decryption
Xor Decryption
Morse Code Decryption
Leet translator
Hash finder
Conversion tools
Contact
Français
English
Conversion tools
Ciphers
Gronsfeld cipher Decryption
Tritheme cipher Decryption
ROT13 Decryption
Caesar cipher Decryption
Polybius square Decryption
Vigenere cipher Decryption
Letters frequency analysis
Downloads
Md5decrypt.net Free Wordlist
Unfound Md5 Sorted List
Unfound Sha1 Sorted List
Unfound Sha256 Sorted List
Unfound Sha384 Sorted List
Unfound Sha512 Sorted List
Unfound Md4 Sorted List
API
Contact
FR

EN
Tritheme Cipher
Encrypt
&
Decrypt
Tritheme Cipher :
Tritheme Cipher (or Trithemius in Latin) is a polyalphabetic cipher. That means one letter of the plain text can be encrypted into several different letters in the ciphered text. This avoid, or at least makes it more difficult, to break the code by a simple
frequency analysis
.
This cipher had been created during Renaissance period by a German Abbot, Thritheme. More precisly, he wrote a book "Polygraphiae" (which talks about cryptography) around the year 1500. This book presents, among other subjects, a table (the Tritheme table) called "substitution table" which shows in absciss and ordinate the alphabet letters (like the
Vigenere cipher
for instance). Tritheme then refers to this table to encrypt the letters of plain text. The Trithem cipher is actually very simple, since it is just a sequence of
Caesar cipher
applied to each letter separetely with a different shift (actually a lot like
Gronsfeld cipher
but in a more predictive way). The shifts just grow after each letter, which means  starting with 0  the firest letter won't move, the second one will move of one position in the alphabet, the third will move of two positions, etc. One can point out that encrypt a word of  for instance  ten letters using Tritheme cipher is actually the same than encrypting it using Gronsfeld cipher with the key "0123456789".
The Tritheme cipher is very easy to break, as you just have to invert the encrypting process, that is, starting from 0, shift the letters incrementaly but from Z to A instead of A to Z. Just as other polyalphabetic ciphers, the frequency analysis allows (under some circumstances by repetition of certain letters groups that were shifted in the same way) to retrieve the plain text, thus breaking the code. However, the Tritheme cipher is very simple, so doesn't need frequency analysis.
Mentions légales
 Donate
 7,247,029 cracked hashes since 11/2015