This is the "Secure Element Daemon" used to communicate with the secure element hardware on the device. It is interacted with by the nfcd daemon using XPC.
SELD plist:
{
EnablePressuredExit = 1;
EnableTransactions = 1;
ExitTimeOut = 40;
Label = "com.apple.seld";
MachServices = {
"com.apple.seld" = 1;
"com.apple.seld.aps" = 1;
};
Program = "/usr/libexec/seld";
RunAtLoad = 1;
UserName = mobile;
}
ApplePay personalization is performed using EMV BER-TLV commands to the secure element.
Major objects in the seld binary are:
- NFSecureElement(CertificateAuthority)
- SEDaemon
- NFSecureElement(ISO7816)
- NFSecureElement
- NFSecureElement(ContactlessRegistry)
- NFSecureElementCache
- NFSecureElementRemoteAdminAgent
- NFSecureElementRemoteAdminRequest
- NFSecureElementRemoteAdminRegistry
- NFResponseAPDU
- NFCardManagerAgent
- NFCardManagerAgent_XPC