lwc
light weight cryptography
factor
指标： block size, key length, gate area, technology value, round, latency, throughput
design complexity is determined by the gate value => 逻辑门。。。
ge (gate equivalent)
gate area : energy consumption relate to chip area => 大小。。。
cmos technology node: 密度。。。
security enhancement, decreasing latency, reducing energy consumption, lowering power consumption, chip area reducion
algorithm
key size, block size, round, structure type
LWBC: Lightweight Block Cipher
FN: feistel network, 加解密电路相同(chaos-based prng, present, …)
SPN: subtitution permutation network，没有key schedule(lwhc, qarma, lcc, …)
SPN consume more resource than FN
LWSC: Lightweight Stream Cipher
lsc, hybrid symmetric, a4, llsc, …
LSFR: linear feedback shift registers
NLFSRs: nonlinear feedback shift registers
rc4, salsa20, trivium, chacha
ecc(modified ecc, iecc)
trade off
security, cost, performance