diff --git a/src/lib/blah/structures/keybox.ts b/src/lib/blah/structures/keybox.ts
new file mode 100644
index 0000000..9b8e127
--- /dev/null
+++ b/src/lib/blah/structures/keybox.ts
@@ -0,0 +1,8 @@
+import type { BlahSignedPayload } from '../crypto';
+
+export type BlahActKeyEntry = {
+	exp: number;
+};
+export type BlahSignedActKeyEntry = BlahSignedPayload<BlahActKeyEntry>;
+
+export type BlahKeyBox = BlahSignedPayload<BlahSignedActKeyEntry[]>;