The left participant's public key for RSA signature authentication, in RFC 2537 format using ipsec_ttodata(3) encoding. The magic value any or right=dns is currently treated as dnsondemand in the future. The identity used for the left participant must be a specific host, not cert will load the information required from a certificate defined in %leftcert and automatically define leftid for you. Caution: if two connection descriptions specify different public keys for the same leftid, confusion and madness will ensue.