the mystery of a dead man 's body washed up on a beach 67 years ago may be solved thanks to the technological advances in dna testing .
people walking along somerton beach , southwest of adelaide , found a dead fully-clothed man , aged about 45 , lying on shore on december 1 , 1948 .
post-mortem concluded he died of poisoning but type was undetectable .
handwritten note found in pocket of trousers but did n't provide any clues .
the persian phrase ` ended ' was scrawled on the scrap of paper and secret code and woman 's telephone number in book where paper came from .
experts now say they have a good chance of identifying body through dna .