diff --git a/CHANGELOG.md b/CHANGELOG.md
index 76f722b..a9ceca6 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
+### Added
+- Add test scenario `security.edgeCase.tokenWithNoOwner` and `security.edgeCase.tokenWithTwoOwners`, closes #10.
 
 ## 0.0.9 - 2023-09-14
 ### Changed
diff --git a/node/security/edgeCase/tokenWithNoOwner/data.json b/node/security/edgeCase/tokenWithNoOwner/data.json
new file mode 100755
index 0000000..fcd3cdd
--- /dev/null
+++ b/node/security/edgeCase/tokenWithNoOwner/data.json
@@ -0,0 +1,8 @@
+{
+  "type": "Data",
+  "id": "ebc364c6-ba06-4e80-9491-9bcc091199c6",
+  "data": {
+    "name": "Data 1",
+    "test": "security.edgeCase.tokenWithNoOwner"
+  }
+}
\ No newline at end of file
diff --git a/node/security/edgeCase/tokenWithNoOwner/token.json b/node/security/edgeCase/tokenWithNoOwner/token.json
new file mode 100644
index 0000000..e8b88e1
--- /dev/null
+++ b/node/security/edgeCase/tokenWithNoOwner/token.json
@@ -0,0 +1,10 @@
+{
+  "type": "Token",
+  "id": "adc8ae1e-d86c-4fe4-8a12-1fb7c485d360",
+  "data": {
+    "token": "secret-token:D44551NKEtvd9KgHXTPd32",
+    "hash": "b392c63b12d58dbb06a8c79b933de399ac6826b1f3b53f9f9f272d8f8bcbdb01",
+    "test": "security.edgeCase.tokenWithNoOwner",
+    "note": "Token contains token only due to testing purposes."
+  }
+}
\ No newline at end of file
diff --git a/node/security/edgeCase/tokenWithTwoOwners/data.json b/node/security/edgeCase/tokenWithTwoOwners/data.json
new file mode 100755
index 0000000..846b92a
--- /dev/null
+++ b/node/security/edgeCase/tokenWithTwoOwners/data.json
@@ -0,0 +1,8 @@
+{
+  "type": "Data",
+  "id": "d69f2e6c-ce6a-4915-a567-acf0c1fc4432",
+  "data": {
+    "name": "Data 1",
+    "test": "security.edgeCase.tokenWithTwoOwners"
+  }
+}
\ No newline at end of file
diff --git a/node/security/edgeCase/tokenWithTwoOwners/token.json b/node/security/edgeCase/tokenWithTwoOwners/token.json
new file mode 100644
index 0000000..ee3eb93
--- /dev/null
+++ b/node/security/edgeCase/tokenWithTwoOwners/token.json
@@ -0,0 +1,10 @@
+{
+  "type": "Token",
+  "id": "bbf1baf9-c665-4470-9a1d-47483da18bf3",
+  "data": {
+    "token": "secret-token:Fqd0dnLYhXdPSMvMi3c8Bp",
+    "hash": "f653db301feb9592bdd5000accb591c316f39df7f8cec730b5c0559049a68217",
+    "test": "security.edgeCase.tokenWithTwoOwners",
+    "note": "Token contains token only due to testing purposes."
+  }
+}
\ No newline at end of file
diff --git a/node/security/edgeCase/tokenWithTwoOwners/user1.json b/node/security/edgeCase/tokenWithTwoOwners/user1.json
new file mode 100755
index 0000000..79a47ee
--- /dev/null
+++ b/node/security/edgeCase/tokenWithTwoOwners/user1.json
@@ -0,0 +1,9 @@
+{
+  "type": "User",
+  "id": "3b9bd45a-a363-434f-8956-2877857c7456",
+  "data": {
+    "name": "User 1",
+    "email": "user1@99-06.localhost.de",
+    "test": "security.edgeCase.tokenWithTwoOwners"
+  }
+}
\ No newline at end of file
diff --git a/node/security/edgeCase/tokenWithTwoOwners/user2.json b/node/security/edgeCase/tokenWithTwoOwners/user2.json
new file mode 100755
index 0000000..6542d72
--- /dev/null
+++ b/node/security/edgeCase/tokenWithTwoOwners/user2.json
@@ -0,0 +1,9 @@
+{
+  "type": "User",
+  "id": "9827facc-40b0-40ca-a7a5-ff947e1c4b86",
+  "data": {
+    "name": "User 2",
+    "email": "user2@99-06.localhost.de",
+    "test": "security.edgeCase.tokenWithTwoOwners"
+  }
+}
\ No newline at end of file
diff --git a/relation/security/edgeCase/tokenWithNoOwner/owns.json b/relation/security/edgeCase/tokenWithNoOwner/owns.json
new file mode 100755
index 0000000..003dec8
--- /dev/null
+++ b/relation/security/edgeCase/tokenWithNoOwner/owns.json
@@ -0,0 +1,9 @@
+{
+  "type": "OWNS",
+  "id": "5e40ab34-6aa3-41ac-8c0a-0902ed491b0e",
+  "start": "adc8ae1e-d86c-4fe4-8a12-1fb7c485d360",
+  "end": "ebc364c6-ba06-4e80-9491-9bcc091199c6",
+  "data": {
+    "test": "security.edgeCase.tokenWithNoOwner"
+  }
+}
\ No newline at end of file
diff --git a/relation/security/edgeCase/tokenWithTwoOwners/owns-token1.json b/relation/security/edgeCase/tokenWithTwoOwners/owns-token1.json
new file mode 100755
index 0000000..c8b1e68
--- /dev/null
+++ b/relation/security/edgeCase/tokenWithTwoOwners/owns-token1.json
@@ -0,0 +1,9 @@
+{
+  "type": "OWNS",
+  "id": "9ebf3a30-fcfe-42a5-9842-4b0cceab1bcb",
+  "start": "3b9bd45a-a363-434f-8956-2877857c7456",
+  "end": "bbf1baf9-c665-4470-9a1d-47483da18bf3",
+  "data": {
+    "test": "security.edgeCase.tokenWithTwoOwners"
+  }
+}
\ No newline at end of file
diff --git a/relation/security/edgeCase/tokenWithTwoOwners/owns-token2.json b/relation/security/edgeCase/tokenWithTwoOwners/owns-token2.json
new file mode 100755
index 0000000..bc124ce
--- /dev/null
+++ b/relation/security/edgeCase/tokenWithTwoOwners/owns-token2.json
@@ -0,0 +1,9 @@
+{
+  "type": "OWNS",
+  "id": "eb2d3e59-bb20-4b7a-86e8-448560fd287a",
+  "start": "9827facc-40b0-40ca-a7a5-ff947e1c4b86",
+  "end": "bbf1baf9-c665-4470-9a1d-47483da18bf3",
+  "data": {
+    "test": "security.edgeCase.tokenWithTwoOwners"
+  }
+}
\ No newline at end of file
diff --git a/relation/security/edgeCase/tokenWithTwoOwners/owns.json b/relation/security/edgeCase/tokenWithTwoOwners/owns.json
new file mode 100755
index 0000000..1ea841f
--- /dev/null
+++ b/relation/security/edgeCase/tokenWithTwoOwners/owns.json
@@ -0,0 +1,9 @@
+{
+  "type": "OWNS",
+  "id": "5816dad6-b94a-433f-a7d7-61a7d647da14",
+  "start": "bbf1baf9-c665-4470-9a1d-47483da18bf3",
+  "end": "d69f2e6c-ce6a-4915-a567-acf0c1fc4432",
+  "data": {
+    "test": "security.edgeCase.tokenWithTwoOwners"
+  }
+}
\ No newline at end of file