I have an exercise to do regarding Vigenère encryption.
I've got the cipher text:
and a partial plain text:
The key length is unknown.
The question is: is it possible to find the key and the plain text? Regarding what I've seen in class, I don't think it's possible.
But I was wondering if it was possible in some way with a computer to find the rest of the plain text and the key?
PS: neither the plain text or the key are in English.