Viper's Secret Mystery Cache

Four difficult challenges await you. No fences were crossed, plants damaged or "No Trespassing" ignored. Make your own way through a trackless environment. The starting point is not the cache location. Let each Geocacher make his or her own discoveries.

During the last war, U.S. troops entered some of Sadam's many palaces and offices. Found among the computer files were photos and coded data. Our agent Viper has sent us a photo and one message coded by Iraq's Code Department.

We have studied these in detail without any luck. We hope you can help. The code is an old French code from the court of Henry III in the sixteenth century. We can not find the key anywhere but believe it is 12 digits or less in length based on past experience.

Message found on the Palace computer:
DSWRGPTYHHEEVTMYHRZSAGTVYSEXAGAIAGAAWVAEUCFYFWEIZHMRVMHVWWO
XM KEKOOFLWPAJZSZHAGGKVVUWEBNZZHQVGYIEMCDQSMIFUKQHGDNFDHTELA
ELZSPXZXSRTSBEKLW FYRRSJTLCVTTMKVOULGIMLAIEHGURYEEKYOZWEBSJP
CZAWYOLURFLALPZJHGVWBNYPGOSEIUKL FQQSBLGYCSVSFIUVBAXCGONDVMX
LAIJWOEWOHRUJCGPVUEZAWELGIEUAVMXKHLMPBSXZBSTVRQ AAELRSZAAMLT
FMWZHLAENLOBSFLOWTOEWVXSKYIOXAHNKOOFAWTRVZIDIALSKPZXLAWDVUK
UXZBNKOSOSMGTIFCRMJTQNLRUHXBNUHDMVLBACJCAVVBNRASRSJAIJJOOLW
PEKOWZOAMIJAVU VLRFFBFEMPMEVUDAMFMSVCSZDWKOKOFQIOXACZCRSMGDJ
VAQVSMHVYBUGWIHFACQRZTNTLAQRL LOWAKMVWHNYPGOSEIUKLFEXZTTTVIX
HTXUJLRFSSETVYVUHWWAKHKUXZBNGOCFSKMHVYSIEKTC FWMAJLAEGYCSVSF
CRSZQHUTMFBTXEYXIEHRPMLBOEACESEXAUVPQTJHDLJHEWMVHRZCZIUTLCL
RQPWFEEAG