Unified Compact ECC-AES Co-Processor with Group-Key Support for IoT Devices in Wireless Sensor Networks

. 2018 Jan 16;18(1):251. doi: 10.3390/s18010251

Algorithm 1 Montgomery ladder algorithm

Require: k, P
Ensure:

k P

P_{1} \leftarrow P, P_{2} \leftarrow 2 P

2: for

i = m - 2 downto 0

do
3: if

k_{i} = 0

then
4:

P_{1} \leftarrow 2 P_{1}, P_{2} \leftarrow P_{1} + P_{2}

5: else
6:

P_{1} \leftarrow P_{1} + P_{2}, P_{2} \leftarrow 2 P_{1}

  7: end if
  8: end for
  9: return

P_{1}