diff --git a/hawkbit-security-core/src/main/java/org/eclipse/hawkbit/im/authentication/SpPermission.java b/hawkbit-security-core/src/main/java/org/eclipse/hawkbit/im/authentication/SpPermission.java
index 7fe5b5bba..5f8840a6c 100644
--- a/hawkbit-security-core/src/main/java/org/eclipse/hawkbit/im/authentication/SpPermission.java
+++ b/hawkbit-security-core/src/main/java/org/eclipse/hawkbit/im/authentication/SpPermission.java
@@ -19,6 +19,7 @@ import lombok.NoArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.security.core.GrantedAuthority;
+import org.springframework.util.function.SingletonSupplier;
 
 /**
  * <p>
@@ -153,12 +154,7 @@ public final class SpPermission {
             TENANT_CONFIGURATION + IMPLIES + READ_TENANT_CONFIGURATION + LINE_BREAK +
             TENANT_CONFIGURATION + IMPLIES + READ_GATEWAY_SEC_TOKEN + LINE_BREAK;
 
-    /**
-     * Return all permission.
-     *
-     * @return all permissions
-     */
-    public static List<String> getAllAuthorities() {
+    private static final SingletonSupplier<List<String>> ALL_AUTHORITIES = SingletonSupplier.of(() -> {
         final List<String> allPermissions = new ArrayList<>();
         final Field[] declaredFields = SpPermission.class.getDeclaredFields();
         for (final Field field : declaredFields) {
@@ -173,5 +169,13 @@ public final class SpPermission {
             }
         }
         return allPermissions;
+    });
+    /**
+     * Return all permission.
+     *
+     * @return all permissions
+     */
+    public static List<String> getAllAuthorities() {
+        return ALL_AUTHORITIES.get();
     }
 }
\ No newline at end of file
diff --git a/hawkbit-security-core/src/main/java/org/eclipse/hawkbit/im/authentication/SpringEvalExpressions.java b/hawkbit-security-core/src/main/java/org/eclipse/hawkbit/im/authentication/SpringEvalExpressions.java
index 0d1a66129..72409659a 100644
--- a/hawkbit-security-core/src/main/java/org/eclipse/hawkbit/im/authentication/SpringEvalExpressions.java
+++ b/hawkbit-security-core/src/main/java/org/eclipse/hawkbit/im/authentication/SpringEvalExpressions.java
@@ -66,10 +66,8 @@ public final class SpringEvalExpressions {
     public static final String HAS_AUTH_READ_TARGET_TYPE = HAS_AUTH_PREFIX + SpPermission.READ_TARGET_TYPE + HAS_AUTH_SUFFIX;
     public static final String HAS_AUTH_DELETE_TARGET_TYPE = HAS_AUTH_PREFIX + SpPermission.DELETE_TARGET_TYPE + HAS_AUTH_SUFFIX;
 
-    public static final String HAS_AUTH_CREATE_DISTRIBUTION_SET = HAS_AUTH_PREFIX + SpPermission.CREATE_DISTRIBUTION_SET + HAS_AUTH_SUFFIX;
     public static final String HAS_AUTH_UPDATE_DISTRIBUTION_SET = HAS_AUTH_PREFIX + SpPermission.UPDATE_DISTRIBUTION_SET + HAS_AUTH_SUFFIX;
     public static final String HAS_AUTH_READ_DISTRIBUTION_SET = HAS_AUTH_PREFIX + SpPermission.READ_DISTRIBUTION_SET + HAS_AUTH_SUFFIX;
-    public static final String HAS_AUTH_DELETE_DISTRIBUTION_SET = HAS_AUTH_PREFIX + SpPermission.DELETE_DISTRIBUTION_SET + HAS_AUTH_SUFFIX;
 
     public static final String HAS_AUTH_CREATE_REPOSITORY = HAS_AUTH_PREFIX + SpPermission.CREATE_REPOSITORY + HAS_AUTH_SUFFIX;
     public static final String HAS_AUTH_READ_REPOSITORY = HAS_AUTH_PREFIX + SpPermission.READ_REPOSITORY + HAS_AUTH_SUFFIX;
@@ -96,4 +94,4 @@ public final class SpringEvalExpressions {
 
     public static final String IS_CONTROLLER = "hasAnyRole('" + CONTROLLER_ROLE_ANONYMOUS + "', '" + CONTROLLER_ROLE + "')";
     public static final String IS_CONTROLLER_OR_HAS_AUTH_READ_REPOSITORY_AND_UPDATE_TARGET = IS_CONTROLLER + HAS_AUTH_OR + HAS_AUTH_READ_REPOSITORY_AND_UPDATE_TARGET;
-}
+}
\ No newline at end of file