diff --git a/.ssh/authorized_keys2 b/.ssh/authorized_keys2
index 049de89..83c2dfb 100644
--- a/.ssh/authorized_keys2
+++ b/.ssh/authorized_keys2
@@ -4,19 +4,23 @@ ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAACAQD5VPD5c/pBtQM5mcKMzJ6vC2jDdVJU6ifkP1EvAeV/
 
 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPmMImRSAhksHUfCwNpcj61izGn0Xkv1KRIuxb0OSdJl pc0/old
 
-ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO4K5S3zDYbxlw7B45zOdmKud95nXU1V6kSxEvbTOsy2 pc1.ibd.ink
-
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO4K5S3zDYbxlw7B45zOdmKud95nXU1V6kSxEvbTOsy2 pc1/old
 
+# keys below are the new security system starting from 2022-07
 sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIGdLJYOrBhWERmkQ+sNM8tGzJ37UBEKkEuhbtE9B65mOAAAABHNzaDo= sk0/fido
 
 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGakUcSuNhuH7tk+Nj9gDfRtxYfGPL9yb8toQ/EpSJAM openpgp:0xD9271B01
 
 ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBPaD/LLrNAX2/P2pvF6FlKiz6nyq3nCcvyN4ZChE3WCEHnMPS/7dhcPI+OhgxPsnkVnpCpKDij5irTltfLm7+w6rsUNuydkIYwnguWbwAuhEy+jg+8MUv6ITrExnn0oE6Q== sk0/piv/9a
 
+expiry-time="20230713151850" ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCtR1ZSd/vLjxgPLo/UUM8XST4MAVA9EoEBKpN4ABsczV30iETElX1tls6hvycp9Np8KtErcVqi2Fg8F6RhDerY8smVoYS9u+gcXD4Vg12JHGWnue0xEoFrCTGozjIa9AX4mS+ROG+kL4lJA83SKkRoA6d+qzjECQvt0jkECMwkOAOzFtRzU9R2+Q1Ig5Ccza41kA1RnDjvN+jrlRYedfBRdaYt4AqqwDLjIxF8neSEEha7jW6jKcjeTq1E6akf7FbkcpizIQ7iAE5OdVZMhs9mMj4M/2ABLM7XsTkopiU+rapx5A3Xi82cNqvei6NS8yWmIdjQxQuXzFNFmVZI+UxX sk0/piv/9d
+
 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFO4k0tJ+Bfu95Uavg/5P3EXMKNcq+bMqaTqzkvRZ7ji ltp1
 
 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGZFTyR+R86fUpZBDkDR9yYzJpmeNsIv2CMHTh6EuEeq pc0
 
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAID8WHIpwdZl7+HIZfQpwIAhpxT1huI9sd6Ydeokilg5l pc1
+
 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBJ/+BWSTv3w1Ru9ksfse3EUbu4ukJruUU94fCG7Sk+5g3+F80KqJGykP9tHueU07iZfAuaYj7Zcy+IWx9Ih+eYA= ph0/sep
 
 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBNvHya5i3GNniGww9Yx5ikos4Z5jevu8zz8hCQi05++SgejFPnbw9UjbHFjODK2M+ZHuhRF5mdf996r4/BxWyP8= pad0/sep