diff --git a/sca/ascad/README.md b/sca/ascad/README.md
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--- a/sca/ascad/README.md
+++ b/sca/ascad/README.md
@@ -1,3 +1,4 @@
 # meow
 
 accompanying code to <https://write.lain.faith/~/Haskal/correlation-power-analysis-from-scratch>
+and <https://write.lain.faith/~/Haskal/cpa-2-the-cp-aening>
diff --git a/sca/ascad/first_order_fft.png b/sca/ascad/first_order_fft.png
new file mode 100644
index 0000000..5bf5afd
Binary files /dev/null and b/sca/ascad/first_order_fft.png differ