I have been following the how-to "Setting up a secure site using ssl" on Windows 2000+jdk 1.3 and I get the following error C:\certificates>keytool -keystore keystore -keyalg "RSA" -import -trustcacerts - file my.host.com.cer -storepass 123456 keytool error: java.security.cert.CertificateException: Unsupported encoding I have tried with Netscape 4.74 and Explorer 5.5. Any idea?