Hello, The latest version (2.9.0) of VFS is using com.jcraft.jsch for sftp. Unfortunately it seems jsch is not maintained any more therefore it does not support the new OPENSSH format of private key.
Are you planning to switch to jsch fork com.github.mwiede which supports new formats? I see in Camel project such change was done: https://issues.apache.org/jira/browse/CAMEL-17835 Best Regards Konrad Samburski