diff --git a/thread/framework/java/android/net/thread/IStateCallback.aidl b/thread/framework/java/android/net/thread/IStateCallback.aidl
index 57c365b..d074b01 100644
--- a/thread/framework/java/android/net/thread/IStateCallback.aidl
+++ b/thread/framework/java/android/net/thread/IStateCallback.aidl
@@ -24,5 +24,5 @@
     void onPartitionIdChanged(long partitionId);
     void onThreadEnableStateChanged(int enabledState);
     void onEphemeralKeyStateChanged(
-            int ephemeralKeyState, @nullable String ephemeralKey, long expiryMillis);
+            int ephemeralKeyState, @nullable String ephemeralKey, long lifetimeMillis);
 }
diff --git a/thread/framework/java/android/net/thread/ThreadNetworkController.java b/thread/framework/java/android/net/thread/ThreadNetworkController.java
index f716f98..f82d211 100644
--- a/thread/framework/java/android/net/thread/ThreadNetworkController.java
+++ b/thread/framework/java/android/net/thread/ThreadNetworkController.java
@@ -420,7 +420,9 @@
 
         @Override
         public void onEphemeralKeyStateChanged(
-                @EphemeralKeyState int ephemeralKeyState, String ephemeralKey, long expiryMillis) {
+                @EphemeralKeyState int ephemeralKeyState,
+                String ephemeralKey,
+                long lifetimeMillis) {
             if (!Flags.epskcEnabled()) {
                 throw new IllegalStateException(
                         "This should not be called when Ephemeral key API is disabled");
@@ -430,7 +432,7 @@
             final Instant expiry =
                     ephemeralKeyState == EPHEMERAL_KEY_DISABLED
                             ? null
-                            : Instant.ofEpochMilli(expiryMillis);
+                            : Instant.now().plusMillis(lifetimeMillis);
 
             try {
                 mExecutor.execute(
diff --git a/thread/service/java/com/android/server/thread/ThreadNetworkControllerService.java b/thread/service/java/com/android/server/thread/ThreadNetworkControllerService.java
index 3d854d7..dbcea78 100644
--- a/thread/service/java/com/android/server/thread/ThreadNetworkControllerService.java
+++ b/thread/service/java/com/android/server/thread/ThreadNetworkControllerService.java
@@ -1787,7 +1787,7 @@
                             .onEphemeralKeyStateChanged(
                                     newState.ephemeralKeyState,
                                     passcode,
-                                    newState.ephemeralKeyExpiryMillis);
+                                    newState.ephemeralKeyLifetimeMillis);
                 } catch (RemoteException ignored) {
                     // do nothing if the client is dead
                 }
@@ -1800,7 +1800,7 @@
             if (oldState.ephemeralKeyState != newState.ephemeralKeyState) return true;
             if (oldState.ephemeralKeyState == EPHEMERAL_KEY_DISABLED) return false;
             return (!Objects.equals(oldState.ephemeralKeyPasscode, newState.ephemeralKeyPasscode)
-                    || oldState.ephemeralKeyExpiryMillis != newState.ephemeralKeyExpiryMillis);
+                    || oldState.ephemeralKeyLifetimeMillis != newState.ephemeralKeyLifetimeMillis);
         }
 
         private void onActiveOperationalDatasetChanged(
diff --git a/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java b/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java
index 1792bfb..1074609 100644
--- a/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java
+++ b/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java
@@ -1042,7 +1042,9 @@
                     listener2.expectThreadEphemeralKeyMode(EPHEMERAL_KEY_ENABLED);
 
             assertThat(epskc2.getSecond()).isEqualTo(epskc1.getSecond());
-            assertThat(epskc2.getThird()).isEqualTo(epskc1.getThird());
+            // allow time precision loss of a second since the value is passed via IPC
+            assertThat(epskc2.getThird()).isGreaterThan(epskc1.getThird().minusSeconds(1));
+            assertThat(epskc2.getThird()).isLessThan(epskc1.getThird().plusSeconds(1));
         } finally {
             listener2.unregisterStateCallback();
         }