Date: Mon, 3 Mar 2014 10:21:46 -0600 (CST) From: "Valeri Galtsev" <galtsev@kicp.uchicago.edu> To: "RW" <rwmaillists@googlemail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Cryptografically signed ISO images Message-ID: <39523.128.135.70.2.1393863706.squirrel@cosmo.uchicago.edu> In-Reply-To: <20140303160218.072db3fe@gumby.homeunix.com> References: <20140302172759.GA4728@hp-netbook.local> <20140303152943.GA5696@hp-netbook.local> <46383.128.135.70.2.1393861805.squirrel@cosmo.uchicago.edu> <20140303160218.072db3fe@gumby.homeunix.com>
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On Mon, March 3, 2014 10:02 am, RW wrote: > On Mon, 3 Mar 2014 09:50:05 -0600 (CST) > Valeri Galtsev wrote: > >> The only difference I see in general between the signature and SHA-2 >> hash is in a chain of trust. The rest (assurance that what you have >> resembles the signature in one case or SHA-2 hash in the other) is on >> the same level of security. Chain of trust is different though: in >> case of pgp or gpg signature you know the public key of signee from >> some published source (i.e. you trust that source). In case of SHA-2 >> hash you have to trust the web site that provides the hashes, which >> you accomplish by verifying that SSL Certificate the site presents is >> signed by trusted authority and by common sense (is this site related >> to FreeBSD thus authoritative to provide signatures or not). >> >> If someone sees mistake(s) in what I said, please, let me know. > > That's fine if you can download the checksum files by HTTPS, but on an > FTP server it's no more that a check against corruption. Yes, but: if you verified the certificate of https host, you can be sure that ftp on the same IP address is owned by the same people. But I see your point. Yet if you are that cautious, you do have the way to do it to your satisfaction, right? > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" > ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++
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