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Bug#818367: Publish complete CD image signing keys over HTTPS

Package: www.debian.org

https://www.debian.org/CD/verify currently provides fingerprints and
key IDs for the image signing keys, which users can retrieve from a
keyserver. However, GPG fingerprints are merely SHA1 hashes, making
key verification the weakest link in the chain. The TLS certificate,
image hashes and their signatures are already SHA256.

SHA1 is fairly weak nowadays. Fingerprint checking is more of a
stop-gap measure than best practice.

That being said, I urge you to publish the full keys on that page.
This ensures a trust chain at least as good as SHA256, which is very
reasonable for 2016. Users should not rely on checking fingerprints
for keys retrieved over insecure channels.

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