On 15.06.2016 16:17, Warren Young wrote: > On Jun 15, 2016, at 7:57 AM, Александр Кириллов<nevis2us at infoline.su> wrote: >> Nowadays it's quite easy to get normal ssl certificates for free. E.g. >> >> http://www.startssl.com >> http://buy.wosign.com/free > Today, I would prefer Let’s Encrypt: > > https://letsencrypt.org/ > > It is philosophically aligned with the open source software world, rather than act as bait for a company that would prefer to sell you a cert instead. > > I’m only aware of one case where you absolutely cannot use Let’s Encrypt, there is more than one case; just think of trust; lets encrypt only trusts for 3 months; would you really except in an onlineshop, someone trusts this shop? let us think something like this: "when the CA only trusts for 3 months, how should I trust for a longer period which is important for warranty ..." > but it also affects the other public CAs: you can’t get a publicly-trusted cert for a machine without a publicly-recognized and -visible domain name. For that, you still need to use self-signed certs or certs signed by a private CA. A private CA is the same as self signed;