diff --git a/security/authgraph/default/src/fuzzer.rs b/security/authgraph/default/src/fuzzer.rs
index 6a9cfdd..d401777 100644
--- a/security/authgraph/default/src/fuzzer.rs
+++ b/security/authgraph/default/src/fuzzer.rs
@@ -25,7 +25,7 @@
 use std::sync::{Arc, Mutex};
 
 fuzz_target!(|data: &[u8]| {
-    let local_ta = LocalTa::new();
+    let local_ta = LocalTa::new().expect("Failed to create an AuthGraph local TA.");
     let service = AuthGraphService::new_as_binder(Arc::new(Mutex::new(local_ta)));
     fuzz_service(&mut service.as_binder(), data);
 });
diff --git a/security/authgraph/default/src/lib.rs b/security/authgraph/default/src/lib.rs
index 4cd0cb7..43d037c 100644
--- a/security/authgraph/default/src/lib.rs
+++ b/security/authgraph/default/src/lib.rs
@@ -18,7 +18,9 @@
 
 use authgraph_boringssl as boring;
 use authgraph_core::{
+    error,
     key::MillisecondsSinceEpoch,
+    keyexchange,
     ta::{AuthGraphTa, Role},
     traits,
 };
@@ -57,16 +59,17 @@
 
 impl LocalTa {
     /// Create a new instance.
-    pub fn new() -> Self {
-        Self {
+    pub fn new() -> Result<Self, error::Error> {
+        Ok(Self {
             ta: Arc::new(Mutex::new(AuthGraphTa::new(
-                boring::trait_impls(
+                keyexchange::AuthGraphParticipant::new(
+                    boring::crypto_trait_impls(),
                     Box::<boring::test_device::AgDevice>::default(),
-                    Some(Box::new(StdClock::default())),
-                ),
+                    keyexchange::MAX_OPENED_SESSIONS,
+                )?,
                 Role::Both,
             ))),
-        }
+        })
     }
 }
 
diff --git a/security/authgraph/default/src/main.rs b/security/authgraph/default/src/main.rs
index 873eb4e..81f2dd6 100644
--- a/security/authgraph/default/src/main.rs
+++ b/security/authgraph/default/src/main.rs
@@ -65,7 +65,8 @@
     binder::ProcessState::start_thread_pool();
 
     // Register the service
-    let local_ta = LocalTa::new();
+    let local_ta =
+        LocalTa::new().map_err(|e| format!("Failed to create the TA because: {e:?}"))?;
     let service = service::AuthGraphService::new_as_binder(Arc::new(Mutex::new(local_ta)));
     let service_name = format!("{}/{}", SERVICE_NAME, SERVICE_INSTANCE);
     binder::add_service(&service_name, service.as_binder()).map_err(|e| {