diff --git a/src/services/nasc/routes/ac.js b/src/services/nasc/routes/ac.js
index c1ce355..b34c0b1 100644
--- a/src/services/nasc/routes/ac.js
+++ b/src/services/nasc/routes/ac.js
@@ -1,4 +1,4 @@
-const fs = require('fs');
+const fs = require('fs-extra');
 const express = require('express');
 const util = require('../../../util');
 const database = require('../../../database');
@@ -55,12 +55,21 @@ async function processLoginRequest(request) {
 
 	const cryptoPath = `${__dirname}/../../../../certs/nex/${service_name}`;
 
-	const publicKey = fs.readFileSync(`${cryptoPath}/public.pem`);
-	const hmacSecret = fs.readFileSync(`${cryptoPath}/secret.key`);
+	let publicKey = cache.getNEXPublicKey(service_name);
+	if (publicKey === null) {
+		publicKey = await fs.readFile(`${cryptoPath}/public.pem`);
+		await cache.setNEXPublicKey(service_name, publicKey);
+	}
+
+	let secretKey = cache.getNEXSecretKey(service_name);
+	if (secretKey === null) {
+		secretKey = await fs.readFile(`${cryptoPath}/secret.key`);
+		await cache.setNEXSecretKey(service_name, secretKey);
+	}
 
 	const cryptoOptions = {
 		public_key: publicKey,
-		hmac_secret: hmacSecret
+		hmac_secret: secretKey
 	};
 
 	const tokenOptions = {