diff --git a/de4dot.code/deobfuscators/CryptoObfuscator/AntiDebugger.cs b/de4dot.code/deobfuscators/CryptoObfuscator/AntiDebugger.cs
index c77115c0..5d0a84f5 100644
--- a/de4dot.code/deobfuscators/CryptoObfuscator/AntiDebugger.cs
+++ b/de4dot.code/deobfuscators/CryptoObfuscator/AntiDebugger.cs
@@ -70,7 +70,8 @@ namespace de4dot.code.deobfuscators.CryptoObfuscator {
 					!ContainsString(method, "run under") &&
 					!ContainsString(method, "run with") &&
 					!ContainsString(method, "started under") &&
-					!ContainsString(method, "{0} detected"))
+					!ContainsString(method, "{0} detected") &&
+					!ContainsString(method, "{0} found"))
 					continue;
 
 				antiDebuggerType = type;
diff --git a/de4dot.code/deobfuscators/CryptoObfuscator/ProxyCallFixer.cs b/de4dot.code/deobfuscators/CryptoObfuscator/ProxyCallFixer.cs
index b296ff6c..d8ff5395 100644
--- a/de4dot.code/deobfuscators/CryptoObfuscator/ProxyCallFixer.cs
+++ b/de4dot.code/deobfuscators/CryptoObfuscator/ProxyCallFixer.cs
@@ -110,7 +110,7 @@ namespace de4dot.code.deobfuscators.CryptoObfuscator {
 		MethodDef GetProxyCreateMethod(TypeDef type) {
 			if (DotNetUtils.FindFieldType(type, "System.ModuleHandle", true) == null)
 				return null;
-			if (type.Fields.Count < 1 || type.Fields.Count > 18)
+			if (type.Fields.Count < 1 || type.Fields.Count > 20)
 				return null;
 
 			MethodDef createMethod = null;
diff --git a/de4dot.code/deobfuscators/CryptoObfuscator/ResourceDecrypter.cs b/de4dot.code/deobfuscators/CryptoObfuscator/ResourceDecrypter.cs
index c836d621..3449cc90 100644
--- a/de4dot.code/deobfuscators/CryptoObfuscator/ResourceDecrypter.cs
+++ b/de4dot.code/deobfuscators/CryptoObfuscator/ResourceDecrypter.cs
@@ -180,6 +180,7 @@ namespace de4dot.code.deobfuscators.CryptoObfuscator {
 		}
 
 		static bool CheckFlipBits(MethodDef method) {
+			int nots = 0;
 			var instrs = method.Body.Instructions;
 			for (int i = 0; i < instrs.Count - 1; i++) {
 				var ldloc = instrs[i];
@@ -189,14 +190,11 @@ namespace de4dot.code.deobfuscators.CryptoObfuscator {
 				if (local == null || local.Type.GetElementType().GetPrimitiveSize() < 0)
 					continue;
 
-				var not = instrs[i + 1];
-				if (not.OpCode.Code != Code.Not)
-					continue;
-
-				return true;
+				if (instrs[i + 1].OpCode.Code == Code.Not)
+					nots++;
 			}
 
-			return false;
+			return (nots & 1) == 1;
 		}
 
 		bool UpdateFlags(MethodDef method, ISimpleDeobfuscator simpleDeobfuscator) {
diff --git a/de4dot.code/deobfuscators/CryptoObfuscator/TamperDetection.cs b/de4dot.code/deobfuscators/CryptoObfuscator/TamperDetection.cs
index 1a44a36a..79392332 100644
--- a/de4dot.code/deobfuscators/CryptoObfuscator/TamperDetection.cs
+++ b/de4dot.code/deobfuscators/CryptoObfuscator/TamperDetection.cs
@@ -84,7 +84,7 @@ namespace de4dot.code.deobfuscators.CryptoObfuscator {
 
 			if (!method.IsStatic || !DotNetUtils.IsMethod(method, "System.Void", "()"))
 				return false;
-			if (type.Methods.Count < 3 || type.Methods.Count > 27)
+			if (type.Methods.Count < 3 || type.Methods.Count > 31)
 				return false;
 			if (DotNetUtils.GetPInvokeMethod(type, "mscoree", "StrongNameSignatureVerificationEx") != null) {
 			}