 Throughout the eighteen @-@ month design process , Samsung implemented stringent security measures and procedures to maintain secrecy of the eventual design until its launch . Designers worked on three prototypes concurrently while regarding each of them as the final product . Doing so required a constant duplication of effort as they had to repeat the same process for all three prototypes . The prototypes , which taking photos of was forbidden , were locked in a separate lab accessible only by core designers . They were transported by trusted company 's employees instead of third @-@ party couriers . " Because we were only permitted to see the products and others weren 't , " explained Principal Engineer Lee Byung @-@ Joon , " we couldn 't send pictures or drawings . We had to explain the Galaxy S III with all sorts of words . " Despite such security measures , specifications of one of the three units were leaked by Vietnamese website <unk> , although it was not the selected design . 
