diff --git a/teaching/2024_2025_-_Crypto_eng/crypto_eng_02_symmetric_encryption-metadata.mp4 b/teaching/2024_2025_-_Crypto_eng/crypto_eng_02_symmetric_encryption-metadata.mp4
index 50c744d..8fff861 100644
Binary files a/teaching/2024_2025_-_Crypto_eng/crypto_eng_02_symmetric_encryption-metadata.mp4 and b/teaching/2024_2025_-_Crypto_eng/crypto_eng_02_symmetric_encryption-metadata.mp4 differ
diff --git a/teaching/2024_2025_-_Crypto_eng/crypto_eng_02_symmetric_encryption.pdf b/teaching/2024_2025_-_Crypto_eng/crypto_eng_02_symmetric_encryption.pdf
index 1fc72f5..2a01af4 100644
Binary files a/teaching/2024_2025_-_Crypto_eng/crypto_eng_02_symmetric_encryption.pdf and b/teaching/2024_2025_-_Crypto_eng/crypto_eng_02_symmetric_encryption.pdf differ
diff --git a/teaching/2024_2025_-_Crypto_eng/index.html b/teaching/2024_2025_-_Crypto_eng/index.html
index 3f808f7..485c44c 100644
--- a/teaching/2024_2025_-_Crypto_eng/index.html
+++ b/teaching/2024_2025_-_Crypto_eng/index.html
@@ -78,10 +78,12 @@ <h2 id="cm">CM</h2>
 <ul>
 <li>CM 1: <a href="./crypto_eng_01_intro.pdf">Security definitions and proof methods</a> (with <a href="https://leo-colisson.github.io/blenderpoint-web/index.html?video=https://leo.colisson.me/teaching/2024_2025_-_Crypto_eng/crypto_eng_01_intro-metadata.mp4">the (few) animations</a>, use Chrome)</li>
 <li>CM 2: <a href="./crypto_eng_02_symmetric_encryption.pdf">Symmetric cryptography</a> (with <a href="https://leo-colisson.github.io/blenderpoint-web/index.html?video=https://leo.colisson.me/teaching/2024_2025_-_Crypto_eng/crypto_eng_02_symmetric_encryption-metadata.mp4">the (few) animations</a>, use Chrome)</li>
+<li>CM 3: <a href="./crypto_eng_03_hash_functions.pdf">Hash functions</a> (with <a href="https://leo-colisson.github.io/blenderpoint-web/index.html?video=https://leo.colisson.me/teaching/2024_2025_-_Crypto_eng/crypto_eng_03_hash_functions-metadata.mp4">the (few) animations</a>, use Chrome)</li>
 </ul>
 <h2 id="td">TD</h2>
 <ul>
 <li>TD 1: <a href="./crypto_eng_td_01.pdf">Proof methods and OT/PRF/PRG</a></li>
+<li>TD 2: <a href="./crypto_eng_td_02.pdf">IND-CPA security</a></li>
 </ul>
           
         </div>