+config DROPBEAR_U2F
+ bool "U2F/FIDO support"
+ default y
+ help
+ This option itself doesn't enable any support for U2F/FIDO
+ but subordinate options do:
+
+ - DROPBEAR_ECDSA_SK - ecdsa-sk keys support
+ depends on DROPBEAR_ECC ("Elliptic curve cryptography (ECC)")
+ - DROPBEAR_ED25519_SK - ed25519-sk keys support
+ depends on DROPBEAR_ED25519 ("Ed25519 support")
+
+config DROPBEAR_ECDSA_SK
+ bool "ECDSA-SK support"
+ default y
+ depends on DROPBEAR_U2F && DROPBEAR_ECC
+ help
+ This enables the following public key algorithm:
+ sk-ecdsa-sha2-nistp256@openssh.com
+
+config DROPBEAR_ED25519_SK
+ bool "Ed25519-SK support"
+ default y
+ depends on DROPBEAR_U2F && DROPBEAR_ED25519
+ help
+ This enables the following public key algorithm:
+ sk-ssh-ed25519@openssh.com
+