MEMFROB(3) Linux Programmer's Manual MEMFROB(3)
memfrob - frobnicate (encrypt) a memory area
void *memfrob(void *s, size_t n);
The memfrob() function encrypts the first n bytes of the memory area s
by exclusive-ORing each character with the number 42. The effect can
be reversed by using memfrob() on the encrypted memory area.
Note that this function is not a proper encryption routine as the XOR
constant is fixed, and is only suitable for hiding strings.
The memfrob() function returns a pointer to the encrypted memory area.
The memfrob() function is unique to the Linux C Library and GNU C
GNU 1993-04-12 MEMFROB(3)