diff --git a/cours/crypto_new.pdf b/cours/crypto_new.pdf
new file mode 100644
index 0000000..a806c13
Binary files /dev/null and b/cours/crypto_new.pdf differ
diff --git a/td/td3.pdf b/td/td3.pdf
new file mode 100644
index 0000000..993e78c
Binary files /dev/null and b/td/td3.pdf differ