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 doc ------ - https://www.latacora.com/blog/2018/04/03/cryptographic-right-answers/ - `On the NIST Lightweight Cryptography Standardization `_ - `libhydrogen `_