Humans have tried for years to figure out this World War II encrypted cipher:
"NCZW VUSX PNYM INHZ XMQX SFWX WLKJ AHSH NMCO CCAK UQPM KCSM HKSE INJU SBLK IOSX CKUB HMLL XCSJ USRR DVKO HULX WCCB GVLI YXEO AHXR HKKF VDRE WEZL XOBA FGYU JQUK GRTV UKAM EURB VEKS UHHV OYHA BCJW MAKL FKLM YFVN RIZR VVRT KOFD ANJM OLBG FFLE OPRG TFLV RHOW OPBE KVWM UQFM PWPA RMFH AGKX IIBG"
Unfortunately, it has been unsolved until recently, with the help of thousands of home computers. As reported by the BBC, German-born Stefan Krah created a code-breaking program that he posted on minimal newsgroups, yet he managed to find enough interest to help solve the puzzle.
It is definitely amazing how complex ciphers from years ago were, but with the aid of technology advances, there's a possibility that many of the mysteries surrounding them could be solved. One can only wonder where this will lead, especially if computers can be used to determine other older messages like cave drawings, etc.