diff --git a/src/models/src/credential.ts b/src/models/src/credential.ts
index 8a8ad7e..ef092a9 100644
--- a/src/models/src/credential.ts
+++ b/src/models/src/credential.ts
@@ -1,4 +1,4 @@
-import { ToJson } from '@/types.ts'
+import type { Base64String, ToJson, UUID } from '@/types.ts'
 import { Ressource } from '@models/ressource.ts'
 
 export class Credential extends Ressource {
@@ -77,29 +77,38 @@ export interface Credential extends Ressource {
 type CredentialCategory<T extends 'password' | 'ssh' | 'passkey'> = T extends
 	'password' ? {
 		store: {
-			hash: string //hex or b64 of Uint8Array
+			hash: Base64String
 			alg: string
-			salt: string //hex or b64 of Uint8Array
+			salt: Base64String
 		}
 	}
 	: T extends 'ssh' ? {
 			store: {
-				publicKey: string
+				publicKey: Base64String
 			}
 		}
 	: T extends 'passkey' ? {
-			store: Record<string, unknown>
+			store: Passkey
 		}
 	: never
 
-/*
-PassKey store:
-{
-    publicKey: Uint8Array
-    keyId: string
-    transport: string
-    counter: number
+/** Passkey store */
+type Passkey = {
+	/** User UUID */
+	user: UUID
+	/** WebAuthn registration key id */
+	webAuthnUserID: string
+	/** Passkey credential unique id */
+	id: string
+	/** Passkey user public key */
+	publicKey: Base64String
+	/** Number of times the authenticator has been used */
+	counter: number
+	/** Whether the passkey is single-device or multi-device */
+	deviceType: 'singleDevice' | 'multiDevice'
+	/** Whether the passkey has been backed up in some way */
+	backedUp: boolean
+	/** Passkey physical transport layer */
+	transports?:
+		('ble' | 'cable' | 'hybrid' | 'internal' | 'nfc' | 'smart-card' | 'usb')[]
 }
-*/
-
-//new Uint8Array(Object.values(JSON.parse(JSON.stringify(new Uint8Array([1, 2, 3])))))
diff --git a/types.ts b/types.ts
index 0b6a87d..b90965d 100644
--- a/types.ts
+++ b/types.ts
@@ -26,3 +26,5 @@ export type Posix = {
 	home: string
 	shell: string
 }
+
+export type Base64String = string