This allows you to cryptographically sign ruby gems, so that a user can later verify that they've downloaded a copy that hasn't been tampered with or hacked.
Verifying stackdriver...
Signature for metadata.gz from user Grant T. Olson (pikimal) <grant@pikimal.com> key 0xE3B5806F is GOODSIG, VALIDSIG and TRUST_ULTIMATE
Signature for data.tar.gz from user Grant T. Olson (pikimal) <grant@pikimal.com> key 0xE3B5806F is GOODSIG, VALIDSIG and TRUST_ULTIMATE
Signature for checksums.yaml.gz from user Grant T. Olson (pikimal) <grant@pikimal.com> key 0xE3B5806F is GOODSIG, VALIDSIG and TRUST_ULTIMATE
ERROR: While executing gem ... (NoMethodError)
undefined method `map' for "This rubygem could not be found.":String
Because we can't do the security check: