HHT gcc代码，专门用于希尔伯特黄变换。-HHT gcc code, specifically for the Hilbert-Huang Transform.

Loki97 is 128-bit block cipher that accepts a variable-length key. It was designed by Lawrie Brown, Josef Pieprzyk, and Jennifer Seberry. Loki97 was one of the 15 candidates for the AES. BONUS The C file, _loki97.c, is a standalone Loki97 i