Stress
Four men and three women have disappeared in the last ten days. The police have received a series of haunting clues spelled out in dried alphabet soup...and you're the only person who can unscramble the complicated Soup Cipher. You've received death threats, you haven't slept for the past nine days, and the only food you've eaten are the dried alphabet soup letter....
Sorry, but no. The life of a cryptographer is way less exciting than television shows and movies like National Treasure make it seem. Impossible-to-solve cases involving coded messages, like that of the "Zodiac killer," are way less common than you might wish.
Stressors in this job will be the same as almost any other desk job: pushy, demanding bosses, deadlines on top of more deadlines, lots of paper-pushing, and meetings....
Hey, it's bureaucracy after all.