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                                            Dylan Crocker

HDWallet: Use some kind of secure zero instead of memset that could be optimised out

How about something like this? ``` void clear(void *buf, uint32_t const sz) { #ifdef _WIN32 SecureZeroMemory(buf, sz); #elseif __STDC_LIB_EXT1__ memset_s(buf, sz, 0, sz); #else volatile unsigned char *volatile pnt_ =...