[qw]

According to the FAQ they are encrypted client side

http://www.jottacloud.com/faq/

"Yes, all datatraffic between your computer and Jottacloud is encrypted with 256 bits AES high grade encryption, which makes it virtually impossible for unauthorized persons to use the information being sent."

[meritt]

That is just referring to SSL.

[nandhp]

SSL keeps your data (relatively) safe from Sweden, though.

And Denmark, too, as my traceroutes seem to show.

[xmcri]

I believe this refers to HTTPS.