Monetary unit worth 1/6 of a a drakhma.

coin representing the value of 1/6 of a drachma

a coin (and a unit of weight) worth one sixth of a drachma

Obol is a specialized high-level programming language for security protocols. The idea is to program closer to the abstractions used to describe and analyze security protocols, and leave all the nasty details to the language's runtime. The runtime will then handle "mundane" issues such as message representation, communication, cryptographic transformations and so on.