Alice and Bob
Alice and Bob are fictional characters commonly used as placeholder names in cryptology, as well as science and engineering literature. The Alice and Bob characters were invented by Ron Rivest, Adi Shamir, and Leonard Adleman in their 1978 paper "A method for obtaining digital signatures and public-key cryptosystems.
They are often headless, faceless, diagrams, sometimes even boxes, and commonly found in exceedingly boring graphics and pitch decks amongst blockchain and crypto companies.
Alice, Alice, who the F*ck is Alice?