[Cialug] Share encrypted files

[Matthew Nuzum]

Engimail makes it very easy as long as each of you has the other’s public key (sharing to a key server makes this easy). The other, maybe more common in the business world, option, is s/mime. Some e-mail clients support this better than gnupg/gpg. You can get a free s/mime certificate using startssl.com. (you should use Firefox to access that site)

If you want maximum flexibility, the other option is to host your own mail server and use SSL certificates (letsencrypt or startssl) so that you can use ssl/tls for the transport. Assuming your devices are encrypted this would give you end to end encryption and privacy using standard email clients, including mobile devices and tablets. You could even set up a web mail interface. You can use a tool like z-push or SOGo and you’d get exchange-like functionality, including push notifications on your mobile devices.

Just remember that if you do this, disable unencrypted POP3/IMAP4 and configure your clients to use SSL/TLS for outgoing SMTP. Of course, if the server isn’t under your control then you do have a weak link. It would take a little diligence but the convenience may make up for it.
-- 
Matthew Nuzum
newz2000 on freenode, skype, linkedin and twitter


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> On Feb 15, 2016, at 4:55 PM, Paul Gray <gray at cs.uni.edu> wrote:
> 
> On 02/15/2016 04:02 PM, WDM Trader wrote:
>> My son and I would like to share / email encrypted files while he is away
>> at college.  We are both using Ubuntu 14.04.  Is there an easy way to do
>> this?  Can you point me to a tutorial or are there some easy tools we
>> already have available in our distro?
> 
> A gpg solution that's readily available (via apt) for integrated into icedove (IceDove in Debian, Thunderbird elsewhere): enigmail
> 
> Just needs gpg pairs in your keychain, and you can send/receive encrypted messages automatically.
> 
> -Paul
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