Before revision: Disadvantages LBIST that requires additional circuitry (or read-only memory) increases the cost of the integrated circuit.
After revision: More security will provide when compared to DES technique.It can handle the data size upto 128,192256 bits.Hackers cannot hack the data even if key and algorithm are knownDisadvantages LBIST that requires additional circuitry (or read-only memory) increases the cost of the integrated circuit.