set term png
set output "verify_keysize.png"
set xtics; set ytics
set grid xtics
set grid ytics
set mxtics; set mytics;
set xrange [512:1024]
set xlabel "key size"
set ylabel "time taken to verify  (milliseconds)"
set title "Time taken to verify a signature as a function of key size; message size = 1000 bytes"
plot "result.keysize.DSA.verify.dat" title "DSA signature" with linespoints, "result.keysize.RSA.verify.dat" title "RSA signature" with linespoints