diff --git a/PatientScannerDemo.xcodeproj/project.pbxproj b/PatientScannerDemo.xcodeproj/project.pbxproj
index eaffd4a..c0ccf8b 100644
--- a/PatientScannerDemo.xcodeproj/project.pbxproj
+++ b/PatientScannerDemo.xcodeproj/project.pbxproj
@@ -21,6 +21,9 @@
 		CEC2C4C42625ED030056E406 /* Base45.swift in Sources */ = {isa = PBXBuildFile; fileRef = CEC2C4C12625ED030056E406 /* Base45.swift */; };
 		CEFAD86D2625F164009AFEF9 /* EC256.swift in Sources */ = {isa = PBXBuildFile; fileRef = CEFAD86C2625F164009AFEF9 /* EC256.swift */; };
 		CEFAD8722625F29E009AFEF9 /* String+JSON.swift in Sources */ = {isa = PBXBuildFile; fileRef = CEFAD8712625F29E009AFEF9 /* String+JSON.swift */; };
+		CEFAD87A26271414009AFEF9 /* COSE.swift in Sources */ = {isa = PBXBuildFile; fileRef = CEFAD87926271414009AFEF9 /* COSE.swift */; };
+		CEFAD87F262714C4009AFEF9 /* EHNTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = CEFAD87E262714C4009AFEF9 /* EHNTests.swift */; };
+		CEFAD88726271B9A009AFEF9 /* Data+hexString.swift in Sources */ = {isa = PBXBuildFile; fileRef = CEFAD88626271B9A009AFEF9 /* Data+hexString.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -60,6 +63,9 @@
 		CEC2C4C12625ED030056E406 /* Base45.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Base45.swift; sourceTree = "<group>"; };
 		CEFAD86C2625F164009AFEF9 /* EC256.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EC256.swift; sourceTree = "<group>"; };
 		CEFAD8712625F29E009AFEF9 /* String+JSON.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "String+JSON.swift"; sourceTree = "<group>"; };
+		CEFAD87926271414009AFEF9 /* COSE.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = COSE.swift; sourceTree = "<group>"; };
+		CEFAD87E262714C4009AFEF9 /* EHNTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EHNTests.swift; sourceTree = "<group>"; };
+		CEFAD88626271B9A009AFEF9 /* Data+hexString.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Data+hexString.swift"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -123,6 +129,8 @@
 				CEA6D6F6261F8D2900715333 /* LaunchScreen.storyboard */,
 				CEA6D6F9261F8D2900715333 /* Info.plist */,
 				CEFAD86C2625F164009AFEF9 /* EC256.swift */,
+				CEFAD87926271414009AFEF9 /* COSE.swift */,
+				CEFAD88626271B9A009AFEF9 /* Data+hexString.swift */,
 			);
 			path = PatientScannerDemo;
 			sourceTree = "<group>";
@@ -132,6 +140,7 @@
 			children = (
 				CEA6D702261F8D2900715333 /* PatientScannerDemoTests.swift */,
 				CEA6D704261F8D2900715333 /* Info.plist */,
+				CEFAD87E262714C4009AFEF9 /* EHNTests.swift */,
 			);
 			path = PatientScannerDemoTests;
 			sourceTree = "<group>";
@@ -281,9 +290,11 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				CEFAD88726271B9A009AFEF9 /* Data+hexString.swift in Sources */,
 				CEC2C4C32625ED030056E406 /* JWK.swift in Sources */,
 				CEC2C4C42625ED030056E406 /* Base45.swift in Sources */,
 				CEA6D6F0261F8D2700715333 /* ViewController.swift in Sources */,
+				CEFAD87A26271414009AFEF9 /* COSE.swift in Sources */,
 				CEFAD86D2625F164009AFEF9 /* EC256.swift in Sources */,
 				CEA6D6EC261F8D2700715333 /* AppDelegate.swift in Sources */,
 				CEFAD8722625F29E009AFEF9 /* String+JSON.swift in Sources */,
@@ -297,6 +308,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				CEA6D703261F8D2900715333 /* PatientScannerDemoTests.swift in Sources */,
+				CEFAD87F262714C4009AFEF9 /* EHNTests.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/PatientScannerDemo/Data+hexString.swift b/PatientScannerDemo/Data+hexString.swift
new file mode 100644
index 0000000..00cdd59
--- /dev/null
+++ b/PatientScannerDemo/Data+hexString.swift
@@ -0,0 +1,29 @@
+//
+//  Data+hexString.swift
+//  PatientScannerDemo
+//
+//  Created by Yannick Spreen on 4/14/21.
+//
+
+import Foundation
+
+extension Data {
+  init?(hexString: String) {
+    let len = hexString.count / 2
+    var data = Data(capacity: len)
+    var i = hexString.startIndex
+    for _ in 0..<len {
+      let j = hexString.index(i, offsetBy: 2)
+      let bytes = hexString[i..<j]
+      if var num = UInt8(bytes, radix: 16) {
+        data.append(&num, count: 1)
+      } else {
+        return nil
+      }
+      i = j
+    }
+    self = data
+  }
+
+  var uint: [UInt8] { [UInt8](self) }
+}
diff --git a/PatientScannerDemo/ViewController.swift b/PatientScannerDemo/ViewController.swift
index addebc0..e6422c1 100644
--- a/PatientScannerDemo/ViewController.swift
+++ b/PatientScannerDemo/ViewController.swift
@@ -29,7 +29,7 @@ class ViewController: UIViewController {
     super.viewDidLoad()
     checkPermissions()
     setupCameraLiveView()
-    observationHandler(payloadS: nil)
+//    observationHandler(payloadS: nil)
   }
   override func viewWillDisappear(_ animated: Bool) {
     super.viewWillDisappear(animated)
@@ -141,24 +141,26 @@ extension ViewController {
     }
 
     print(data)
-    let decoder = SwiftCBOR.CBORDecoder(input: [UInt8](data))
+    let decoder = SwiftCBOR.CBORDecoder(input: data.uint)
     guard
       let cose = try? decoder.decodeItem(),
       case let CBOR.tagged(tag, cborElement) = cose,
-      tag.rawValue == 18,
+      tag.rawValue == 18, // SIGN1
       case let CBOR.array(array) = cborElement,
       case let CBOR.byteString(protectedBytes) = array[0],
       case let CBOR.map(unprotected) = array[1],
       case let CBOR.byteString(payloadBytes) = array[2],
       case let CBOR.byteString(signature) = array[3],
       let protected = try? CBOR.decode(protectedBytes),
-      let payload = try? CBOR.decode(payloadBytes)
+      let payload = try? CBOR.decode(payloadBytes),
+      case let CBOR.map(protectedMap) = protected
     else {
       return
     }
 
     print("START")
     print(protected)
+    print(protectedMap)
     print(unprotected)
     print(payload)
     print(signature)