diff --git a/policies/openssh_8_4.txt b/policies/openssh_8_4.txt
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+#
+# Official policy for hardened OpenSSH v8.4.
+#
+
+name = "Hardened OpenSSH v8.4"
+version = 1
+
+# RSA host key sizes.
+hostkey_size_rsa-sha2-256 = 4096
+hostkey_size_rsa-sha2-512 = 4096
+
+# Group exchange DH modulus sizes.
+dh_modulus_size_diffie-hellman-group-exchange-sha256 = 2048
+
+# The host key types that must match exactly (order matters).
+host keys = rsa-sha2-512, rsa-sha2-256, ssh-ed25519
+
+# Host key types that may optionally appear.
+optional host keys = sk-ssh-ed25519@openssh.com, ssh-ed25519-cert-v01@openssh.com, sk-ssh-ed25519-cert-v01@openssh.com, rsa-sha2-256-cert-v01@openssh.com, rsa-sha2-512-cert-v01@openssh.com
+
+# The key exchange algorithms that must match exactly (order matters).
+key exchanges = curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha256
+
+# The ciphers that must match exactly (order matters).
+ciphers = chacha20-poly1305@openssh.com, aes256-gcm@openssh.com, aes128-gcm@openssh.com, aes256-ctr, aes192-ctr, aes128-ctr
+
+# The MACs that must match exactly (order matters).
+macs = hmac-sha2-256-etm@openssh.com, hmac-sha2-512-etm@openssh.com, umac-128-etm@openssh.com