# Cracking short ciphertexts made by Vigenère cipher

I've encrypted a couple of 10 letters words from https://www.bestwordlist.com/10letterwords.htm using a key of 10 characters. This is done using Vigenere cipher. Decrypt the cipher and give the key

Ciphertext: XRPEFGMHNL XDBEWUMHNL

How we can decipher when we have only 2n size ciphertext where n is the key size

Can you please explain how it can be done? Frequency analysis is not effective in this case as the ciphertext is really short...

• Possible duplicate of How can a Vigenère cipher be broken if the message is short? Nov 4 '18 at 10:35
• I did come across that question, however, it did not help me solve the question Nov 4 '18 at 10:37
• By the way, in this way you asked in the body, is off-topic here. You should as, how we can decipher when we have only $2n$ size ciphertext where $n$ is the key size. Nov 4 '18 at 10:47
• I'll change it to make it clearer Nov 4 '18 at 10:50