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And if you don't mind others being able to see what you're fetching as you're fetching it (the only real benefit to HTTPS in this case).Įven an MITM rewrite of data isn't a critical issue since you can catch that in PGP validation.Naked Bf Of Girls Having Anal Sex PGP/GPG doesn't handle expired keys well.īut the upshot is that HTTP transport of PuTTY is fine from an integrity standpoint, so long as you verify the binary and signatures. It's not cryptographically viable to fake a signature (of a key or data), though if someone manages to lose control of their private key, that's possible. Your session (and its contents) are encrypted and authenticated by the host key, which is signed by the CA's key. In TLS/SSL, you have a hierarchical trust. This does mean, though, trusting people not to sign bogus keys. If someone you trust trusts a key, then you have a transitive trust of a key. Signatures on keys will tell you who trusts those keys. Signatures of the source or binaries will tell you if they've been changed.
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A compromised source code for me is as dangerous as a compromised binary (for me at least).Įssentially: with cryptography, you aren't concerned about the transport, you're concerned about the crypto. I usually don't audit the source code I build from a random project. I just don't have any practice in verifying keys using gnupg.ĭownload the source and build it yourself For my defense you misunderstood mine too. Sorry, seems like I misunderstood your comment. It would be nice if people would sign certificates with comments like this.
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But it seems probable that if somebody signed the PuTTY master keys then it meant that "I trust that this key belongs to the PuTTY team who create the trustworthy PuTTY software" since I wouldn't sign faulty software even if I knew that it came from a valid source. I'm looking at right now and all I see are plain signatures of keys without any comment on the "type of trust" between the two parties (I'm really new to this).
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From that URL I couldn't tell if it's still a trustworthy site from I can download PuTTY. Even if the website had a valid cert signed by a trustworthy CA it wouldn't mean more.
I don't know about common security practices for managing https keys but I would think that a compromised https server would mean a compromised ssl private key too in most cases.Īlso https only verifies that page you see is the one intended to be hosted by the URL's owner. If an attacker somehow can steal the private keys it's bad, but compromising the web page doesn't mean that they have access to the private keys used for the signatures. If you can verify the keys from independent sources you can feel safe (this is where I don't have practice).
An attacker can't change the content without breaking the signatures and keys.