diff --git a/.obsidian/plugins/obsidian-completr/scanned_words.txt b/.obsidian/plugins/obsidian-completr/scanned_words.txt
index b879cbd..2dd321b 100644
--- a/.obsidian/plugins/obsidian-completr/scanned_words.txt
+++ b/.obsidian/plugins/obsidian-completr/scanned_words.txt
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@@ -108194,6 +108647,14 @@ CMGMO
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@@ -112918,6 +113386,13 @@ cRD
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diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 8f9a95f..c4b64d4 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -6,16 +6,16 @@
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+        "dimension": 44.73106476399561,
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+            "id": "174e8faa1bace700",
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               "state": {
-                "file": "Informationssicherheit/Ueb3/Ueb3.md",
-                "mode": "preview",
+                "file": "Informationssicherheit/Ueb4/Ueb4.md",
+                "mode": "source",
                 "source": false
               }
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@@ -25,7 +25,7 @@
       {
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+        "dimension": 55.26893523600439,
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@@ -33,7 +33,7 @@
             "state": {
               "type": "pdf",
               "state": {
-                "file": "Informationssicherheit/Ueb3/03-ueb_uebungsblatt.pdf"
+                "file": "Informationssicherheit/Ueb4/04-ueb_uebungsblatt.pdf"
               }
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@@ -112,7 +112,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "Informationssicherheit/Ueb3/Ueb3.md",
+                "file": "Informationssicherheit/Ueb4/Ueb4.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -129,7 +129,7 @@
             "state": {
               "type": "outgoing-link",
               "state": {
-                "file": "Informationssicherheit/Ueb3/Ueb3.md",
+                "file": "Informationssicherheit/Ueb4/Ueb4.md",
                 "linksCollapsed": false,
                 "unlinkedCollapsed": true
               }
@@ -152,7 +152,7 @@
             "state": {
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               "state": {
-                "file": "Informationssicherheit/Ueb3/Ueb3.md"
+                "file": "Informationssicherheit/Ueb4/Ueb4.md"
               }
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@@ -213,47 +213,13 @@
       "obsidian-wordnet-plugin:WordNet Dictionary": false
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-        "maximize": false,
-        "zoom": 0
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-  },
-  "active": "6d4babaef09a1aa5",
+  "active": "174e8faa1bace700",
   "lastOpenFiles": [
-    "Informationssicherheit/Ueb3/Ueb3.md",
+    "Informationssicherheit/Ueb4/Ueb4.md",
+    "Informationssicherheit/Ueb4/04-ueb_uebungsblatt.pdf",
     "Informationssicherheit/Ueb3/03-ueb_uebungsblatt.pdf",
+    "Informationssicherheit/Ueb3/Ueb3.md",
+    "Informationssicherheit/Ueb4",
     "Algorithmen und Datenstrukturen/UEB04/UEB04.pdf",
     "CCN/Ex02/Exercise 2.md",
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@@ -266,8 +232,6 @@
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-    "Algorithmen und Datenstrukturen/UEB03/UEB03.pdf",
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diff --git a/Informationssicherheit/Ueb4/04-ueb_uebungsblatt.pdf b/Informationssicherheit/Ueb4/04-ueb_uebungsblatt.pdf
new file mode 100644
index 0000000..fc172dd
Binary files /dev/null and b/Informationssicherheit/Ueb4/04-ueb_uebungsblatt.pdf differ
diff --git a/Informationssicherheit/Ueb4/Ueb4.md b/Informationssicherheit/Ueb4/Ueb4.md
new file mode 100644
index 0000000..e69de29