Download Keys

Below are the CLASS keys to be used for verifying digital signatures
obtained with CLASS data. To use the keys do the following:

Save this data to a file (for example, name the file CLASSKEYS).
Add the CLASS keys to your keyring: gpg --import CLASSKEYS
Verify CLASS files: gpg --verify filename

For further information see the Digital Signature section of the CLASS help pages.

The following key is effective from 2005-11-14 to 2006-05-14.

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.0 (AIX)
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=eU4K
-----END PGP PUBLIC KEY BLOCK-----

The following key is effective from 2006-05-15 to 2010-05-01.

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.0 (AIX)
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=NUDc
-----END PGP PUBLIC KEY BLOCK-----

The following key is effective from 2010-05-02 to 2011-05-02.

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.2 (AIX)

mQGiBEvgSBURBACK97iU9iYhrIm2Koxs3P5h72b449q5/bC7XoMGXRcHGUJSPMBM
Rf3Ms1ti190gISQE+9yKx9Ui7Umj2QMMgCXTj85PBZR+/cWVoZ4aaK6YLd0jemNb
ptNm2ur+bEcgsZ4Ch8vHZuIDJj4WeiEoVeLtWRps8mNdllXKHJZ861jDMwCg1vsb
1NcqkCR5uDEH3qDbwqKqAd0D/1jgOyB2p29GPxYrM1k7iAM95p0/nxoDQeep6l5T
kiRr808cmeQhbILM+Tja43n+ZN4b8030u0bVOYBFxe7i1KDdzO7QwHYRvUkh+zLt
sdYspZl6FtgdY+ARsIadpSkpfvdMPlf7oq5w9XRoTkxubOXtOC+I0aU3BTxXq2mf
mIfEA/4rEFaAWcOKdCZghL27fRT00J9r5ocYVK0PLgckaQ37cXhexYRNbaKNrV7D
x5ROBgSpFGlWKb+8/zoo7VqOYwXLpM269sKNiXtfyhoQpcoj1OWufCgSZ7AI3q/j
XSrEAIb0hPwVj3B6OLOd67wEEPpN+9BoN7Pa/xtxbXyvdghbRrREQ0xBU1MgUHJv
ZHVjdGlvbiBNYW5hZ2VyKGRpZ2l0YWwgc2lnbmF0dXJlKSA8c2FhcG1nckBjbGFz
cy5ub2FhLmdvdj6IZQQTEQIAJQUCS+BIFQIbAwUJAeEzgAYLCQgHAwIEFQIIAwMW
AgECHgECF4AACgkQF9d3kzkqTkEmNgCfXWiZQbSi7+MTEvKX+cVe70Gl/tkAnR6n
BFP4RQ5CvU/bNBGNI4AbODhSuQINBEvgSE0QCADOXdxdpXWLajntB47OvXWcz8OH
2NwNxfLs4QC6UQ4j9xCQb2bglOhsxckoj6MD0aDbbXPX5ImiZA9R5ZuIRSPdQCD5
N7q8As945BYWC0jRbxBt4IScWrKgrfzC2zY3FidhfpOYdJecugHqWvK7QU920HMq
/69vjEzJfsiTx7xcYqWX/X1AXxqYPl+HI+SKFDZjOEnA/qeKi06NxFvsQfjQ5VhF
AAvlSuz9I15YBoATN4hLxKjIudQeU0kEDEjMKhp0DQEDFKJ7TGFHlqzlTUA+eCeI
5yuNKDpFUuH1DdexKzod8JE4SFBC+IG0onBn/C+n2/T7Y+ESrCO7Rydu7oWDAAMG
B/4n0enTceXwb/PHat30Ow/zpeR+/g2AtJAre830uUCYkBzhMvSUJJ+Viu+rRQnm
ku5cjUa1mpHglqGLoJePHTNRpZjXVQA8a7+8QBlDdgyRnIehoUJs+H7xPFOIgFzs
GwzfkqASviaExZFYCllPxNqbv2fOH17PfKEeDJwlDwx1KH7ZJ+UQiCHA3SsH0v8K
ku8SWH1r0XsNSxlAOOsOncJqWYBLmsIw0eFXHhT5rqacnyw38YFnaaCfQS6CObTR
vtQhqR/hEKXwG5Ujqa13/EyGTidXVENcL4eEE+9rgY54bytjG22RNFIXSQcJIgOp
K5GkiJp26PvGQu6wRycjy6rCiE8EGBECAA8FAkvgSE0CGwwFCQHhM4AACgkQF9d3
kzkqTkEPHQCgtR3SAV+gmxlCGwPXjaC7NVbF7I0AoJzB87RuWe66VTlnMZrmXEt4
JLD+
=apIf
-----END PGP PUBLIC KEY BLOCK-----

The following key is effective from 2011-05-05 to 2025-12-02.

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.2 (AIX)
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=p7wk
-----END PGP PUBLIC KEY BLOCK-----

The following key is effective from 2025-12-03 to 2040-12-31.