Today, we received an unmarked USB storage device in a mysterious, unmarked envelope. The drive held a simple text file, with the following words: Cryptography; Isotope; Philanthropy; Hydrogen; Ember; Rebirth. Oh, this one's easy! Cryptography; Isotope; Philanthropy; Hydrogen; Ember; Rebirth. Cipher! But for what?
An audio file embedded on the same drive offered only some electronic voices, a sequence of letters and numbers read by a female voice -- M O D [sound of 3 chimes] Z Z Z J N Q R Y D 3 F R P -- and some words spoken by a man: "What we wish, we readily believe, and what we ourselves think, we imagine others think also," followed by, "Don't believe everything you see."
The identity of the man speaking may be impossible to determine, but you might recognize the person he's quoting initially: Julius Caesar. Using a Caesar cipher, and assuming that "mod" and the sound of 3 chimes signaled a shift of 3 letters, we ended up with "W W W G K N O V A 6 COM." That led to a mysterious website, featuring a small, adjustable television set.