Clean up notebooks + pin jupyter extension

Author: zoltanctoth

.devcontainer/devcontainer.json

@@ -11,7 +11,7 @@
 	"customizations": {
 		"vscode": {
 			"extensions": [
-				"ms-toolsai.jupyter",
+				"ms-toolsai.jupyter@2025.7.0",
 				"ms-python.python",
 				"ms-python.black-formatter",
 				"humao.rest-client",
@@ -26,4 +26,4 @@
 	},
 	"postCreateCommand": "bash .devcontainer/setup-container.sh",
 	"postAttachCommand": "bash .devcontainer/setup-terminal.sh",
-}
+}

.vscode/settings.json

@@ -20,4 +20,4 @@
     "github.copilot.enable": {
         "*": false
     }
-}
+}

encryption/hashing.ipynb

@@ -28,7 +28,7 @@
    "outputs": [],
    "source": [
     "# Let's look at a message that contains Unicode characters - any modern text!\n",
-    "message = \"Hello, \uc548\ub155\ud558\uc138\uc694, \u00a1\u00c1rv\u00edzt\u0171r\u0151 t\u00fck\u00f6rf\u00far\u00f3g\u00e9p! @ \ud83c\udfeb\ud83d\udcda\ud83d\udcbb\ud83c\udf93\"\n",
+    "message = \"Hello, 안녕하세요, ¡Árvíztűrő tükörfúrógép! @ 🏫📚💻🎓\"\n",
     "print(message)\n"
    ]
   },
@@ -48,7 +48,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "bytestring = \"Hello, \uc548\ub155\ud558\uc138\uc694, \u00a1\u00c1rv\u00edzt\u0171r\u0151 t\u00fck\u00f6rf\u00far\u00f3g\u00e9p! @ \ud83c\udfeb\ud83d\udcda\ud83d\udcbb\ud83c\udf93\".encode(\"utf-8\")\n",
+    "bytestring = \"Hello, 안녕하세요, ¡Árvíztűrő tükörfúrógép! @ 🏫📚💻🎓\".encode(\"utf-8\")\n",
     "print(bytestring)\n"
    ]
   },
@@ -111,7 +111,7 @@
    "outputs": [],
    "source": [
     "\n",
-    "bytestring = \"My message to the world: Say H\u00e4llo to a better hash!\".encode(\"utf-8\")\n",
+    "bytestring = \"My message to the world: Say Hällo to a better hash!\".encode(\"utf-8\")\n",
     "print(\"Original message: \")\n",
     "print(bytestring)\n",
     "\n",
@@ -241,4 +241,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 5
-}
+}

encryption/password_manager.ipynb

@@ -80,10 +80,10 @@
     "    try:\n",
     "        result = encrypt(test_password)\n",
     "        assert result == expected_hash, f\"Expected {expected_hash}, but got {result}\"\n",
-    "        print(\"\ud83c\udf89 Great job! Your encryption function works perfectly!\")\n",
+    "        print(\"🎉 Great job! Your encryption function works perfectly!\")\n",
     "        return True\n",
     "    except Exception as e:\n",
-    "        print(\"\u274c Not quite right. Make sure you're using SHA256 and hexdigest()\")\n",
+    "        print(\"❌ Not quite right. Make sure you're using SHA256 and hexdigest()\")\n",
     "        print(f\"Error: {str(e)}\")\n",
     "        return False\n",
     "\n",
@@ -121,10 +121,10 @@
     "        assert users[\"alice\"] == encrypt(\"newpassword123\")\n",
     "        assert users[\"alice\"] != old_hash\n",
     "\n",
-    "        print(\"\ud83c\udf1f Excellent! Your function can both add new users and update existing ones!\")\n",
+    "        print(\"🌟 Excellent! Your function can both add new users and update existing ones!\")\n",
     "        return True\n",
     "    except Exception as e:\n",
-    "        print(\"\u274c The add_user function needs some work\")\n",
+    "        print(\"❌ The add_user function needs some work\")\n",
     "        print(f\"Error: {str(e)}\")\n",
     "        return False\n",
     "\n",
@@ -146,10 +146,10 @@
     "        assert check_password(users, \"alice\", \"password123\")\n",
     "        assert not check_password(users, \"alice\", \"wrong\")\n",
     "        assert not check_password(users, \"bob\", \"any\")\n",
-    "        print(\"\ud83c\udfc6 Perfect! Your password checking system is secure!\")\n",
+    "        print(\"🏆 Perfect! Your password checking system is secure!\")\n",
     "        return True\n",
     "    except Exception as e:\n",
-    "        print(\"\u274c The check_password function needs some work\")\n",
+    "        print(\"❌ The check_password function needs some work\")\n",
     "        print(f\"Error: {str(e)}\")\n",
     "        return False\n",
     "\n",
@@ -175,10 +175,10 @@
     "        assert not add_user_with_requirements(users, \"user2\", \"short1\")\n",
     "        assert not add_user_with_requirements(users, \"user3\", \"nodigits\")\n",
     "        assert not add_user_with_requirements(users, \"user4\", \"nocaps123\")\n",
-    "        print(\"\ud83c\udfaf Excellent! Your password requirements are working!\")\n",
+    "        print(\"🎯 Excellent! Your password requirements are working!\")\n",
     "        return True\n",
     "    except Exception as e:\n",
-    "        print(\"\u274c Password requirements need adjustment\")\n",
+    "        print(\"❌ Password requirements need adjustment\")\n",
     "        print(f\"Error: {str(e)}\")\n",
     "        return False\n",
     "\n",
@@ -220,10 +220,10 @@
     "\n",
     "        assert users[\"user1\"] != encrypt(\"same_password\")\n",
     "\n",
-    "        print(\"\ud83c\udf1f Fantastic! Your global salt system is working!\")\n",
+    "        print(\"🌟 Fantastic! Your global salt system is working!\")\n",
     "        return True\n",
     "    except Exception as e:\n",
-    "        print(\"\u274c Global salt implementation needs some work\")\n",
+    "        print(\"❌ Global salt implementation needs some work\")\n",
     "        print(f\"Error: {str(e)}\")\n",
     "        return False\n",
     "\n",
@@ -253,4 +253,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 5
-}
+}

encryption/public_key_cryptography.ipynb

@@ -45,8 +45,8 @@
     "assert PRIVATE_KEY_FILE.exists(), f\"Private key not found at {PRIVATE_KEY_FILE}. CWD: {Path.cwd()}\"\n",
     "assert PUBLIC_KEY_FILE.exists(), f\"Public key not found at {PUBLIC_KEY_FILE}\"\n",
     "\n",
-    "print(f\"\u2713 Found private key: {PRIVATE_KEY_FILE}\")\n",
-    "print(f\"\u2713 Found public key: {PUBLIC_KEY_FILE}\")\n"
+    "print(f\"✓ Found private key: {PRIVATE_KEY_FILE}\")\n",
+    "print(f\"✓ Found public key: {PUBLIC_KEY_FILE}\")\n"
    ]
   },
   {
@@ -98,7 +98,7 @@
     "\n",
     "encrypted_message = public_key_cipher.encrypt(short_secret_message)\n",
     "print(\"Encrypted message:\")\n",
-    "print(encrypted_message)\n",
+    "print(encrypted_message.hex())\n",
     "\n",
     "ENCRYPTED_MESSAGE_FILE = PROJECT_FOLDER / \"encrypted_message.bin\"\n",
     "with open(ENCRYPTED_MESSAGE_FILE, \"wb\") as f:\n",
@@ -154,9 +154,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.13.0"
+   "version": "3.13.5"
   }
  },
  "nbformat": 4,
  "nbformat_minor": 5
-}
+}

encryption/symmetric_encryption.ipynb

@@ -124,7 +124,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.11.0"
+   "version": "3.13.5"
   }
  },
  "nbformat": 4,