Crypto cipher used here is called Vigenere cipher: http://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher
And it can be relatively easily broken: http://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher#Cryptanalysis Known attacks is dated already from year 1893!! So no computer is needed, to crack ciphertext, just the pen and paper.
Crypto cipher used here is called Vigenere cipher: http://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher
And it can be relatively easily broken: http://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher#Cryptanalysis Known attacks is dated already from year 1893!! So no computer is needed, to crack ciphertext, just the pen and paper.