/dev/random

The XCode debugger (and gdb) will confuse you with word & long values. For example, I have an IP address & port stored as the bytes 00 50 c0 a8 0 64 (that’s 192.168.0.100:80). Displaying memory in the debugger will show it as a8c05000 00006400 if you use the default word size of 4. Setting the word size to 1 will show the proper values.