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Date: Thu, 27 Aug 2015 09:33:35 -0700
From: Bill Cox <>
To: "" <>
Subject: Argon2 using memset still

g++ has a habit of optimizing calls to memset away.  I doubt that Argon2
succeed in it's attempts to clear memory.  I copied this function from

/* prevents compiler optimizing out memset() */
static inline void secure_zero_memory( void *v, size_t n )
  volatile uint8_t *p = ( volatile uint8_t * )v;
  while( n-- ) *p++ = 0;


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