2 node [style = rounded, shape = rect] SI [label="Stego Image"]
3 node [style = rounded, shape = rect] key [label="Key k"]
4 node [style = rounded, shape = rect] start [label="Start"]
5 node [style = rounded, shape = rect] end [label="End"]
6 node [style = rounded, shape = rect] PIb [label="Param. b"]
7 node [style = rounded, shape = rect] PIh [label="Param. H"]
8 node [style = rounded, shape = rect] STC [label="m = STCr(y,H)"]
9 node [style = rounded, shape = rect] ED [label="y=edgeDetection(b bits)"]
10 node [style = rounded, shape = rect] decrypt [label="message=decryption(m)"]
12 node [style = "", shape = diamond] condEmb [label="Use of STC"];
14 node [style = rounded, shape = rect] sample [label= "m=sample(y)"]
28 condEmb -> STC [label="Yes"]
29 condEmb -> sample [label="No"]