.TH surf 3
.SH NAME
surf \- Simple Unpredictable Random Function
.SH SYNTAX
.B #include <surf.h>

void \fBsurf\fP(\fIout\fR,\fIin\fR,\fIseed\fR);

uint32 \fIout\fR[8];
.br
uint32 \fIin\fR[12];
.br
uint32 \fIseed\fR[32];
.SH DESCRIPTION
.B surf
changes a 384-bit input to a 256-bit output,
under control of a 1024-bit seed.
When the seed is secret,
.B surf
appears to be indistinguishable from a completely random
384-bit-to-256-bit function.
.SH "SEE ALSO"
surfpcs(3)