1. A security apparatus comprising; a number input device; an address register responsive to said number input device; an encryption schema memory storing an encryption schema including a random array of bits, said on schema memory addressable by said address register to produce both an output code including a length of spring identifier and an encryption algorithm identifier, and a relative address code; and address incrementing logic responsive to said relative address code and operative to increment said address register, whereby said encryption algorithm identifier identifies a particular encryption algorithm utilized to encrypt a set of data having a length defined by said length of string identifier.