local security = require("security")
local cipher = { 
    key = "\x09\x76\x28\x34\x3f\xe9\x9e\x23\x76\x5c\x15\x13\xac\xcf\x8b\x02", 
    iv = "\x56\x2e\x17\x99\x6d\x09\x3d\x28\xdd\xb3\xba\x69\x5a\x2e\x6f\x58" 
} --binary key (size 16 bytes) and binary initialization vector
local decrypted_data = security.decrypt( cipher, "data for decryption" )