diff --git a/modules/filesystem/chn-PC.nix b/modules/filesystem/chn-PC.nix
index f46fbf01..87dd6929 100644
--- a/modules/filesystem/chn-PC.nix
+++ b/modules/filesystem/chn-PC.nix
@@ -55,6 +55,7 @@
 			# cryptsetup luksOpen --test-passphrase --key-slot 0 /dev/sda2
 			# cryptsetup luksKillSlot /dev/sdb1 2
 			yubikeySupport = true;
+			reusePassphrases = false;
 			devices.root =
 			{
 				device = "/dev/disk/by-uuid/55fdd19f-0f1d-4c37-bd4e-6df44fc31f26";
diff --git a/modules/hardware/chn-PC.nix b/modules/hardware/chn-PC.nix
index 7c3a4f65..d6e638dd 100644
--- a/modules/hardware/chn-PC.nix
+++ b/modules/hardware/chn-PC.nix
@@ -43,7 +43,6 @@
 		{
 			"net.core.rmem_max" = 67108864;
 			"net.core.wmem_max" = 67108864;
-			# check
 			"net.ipv4.tcp_rmem" = "4096 87380 67108864";
 			"net.ipv4.tcp_wmem" = "4096 65536 67108864";
 			"net.ipv4.tcp_mtu_probing" = true;