Dropbear

MULTI.md has instructions on making a multi-purpose binary (ie a single binary which performs multiple tasks, to save disk space). You can use ~/.ssh/authorized keys in the same way as with OpenSSH, just put the key entries in that file. They should be of the form: You must make sure that ~/.ssh , and the key file, are only writable by the user. Beware of editors that split the key into multiple lines. You can also get Dropbear to create keys when the first connection is made - this is preferable to generating keys when the system boots. Make sure /etc/dropbear/ exists and then pass -R to the dropbear server. The Dropbear distribution includes a standalone version of OpenSSH's scp program. You can compile it with make scp . You may want to change the path of the ssh binary, specified by PATH SSH PROGRAM in options.h . By default the progress meter isn't compiled in to save space, you can enable it by adding SCPPROGRESS=1 to the make commandline.