Following the directions at
https://software.intel.com/en-us/articles/installing-intel-free-libs-and...
I downloaded the public key from
https://apt.repos.intel.com/intel-gpg-keys/GPG-PUB-KEY-INTEL-SW-PRODUCTS...
previously and kept a copy. Recently my use of that key started to fail and so I downloaded the key again and noticed that it now has two values in it, which is odd.
I tried using the public key that has two keys in it and it mostly works -- in some of the zones in GCP this works fine but in others it doesn't. In one of them that doesn't I did an "apt-key list" and noticed that one of them was expired:
pub 2048R/7E6C5DBE 2019-09-30 [expires: 2023-09-30]
uid Intel(R) Software Development Products
pub 2048R/1911E097 2016-09-28 [expired: 2019-09-27]
uid "CN = Intel(R) Software Development Products", O=Intel Corporation
I wasn't able to do an "apt-key del" and so I started over with just the new key. it shows up with apt-key list as okay:
pub 2048R/7E6C5DBE 2019-09-30 [expires: 2023-09-30]
uid Intel(R) Software Development Products
but I can't do an update:
$ sudo apt-get update
W: GPG error: https://apt.repos.intel.com/intelpython binary/ InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1A8497B11911E097
W: The repository 'https://apt.repos.intel.com/intelpython binary/ InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: https://apt.repos.intel.com/mkl all InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1A8497B11911E097
W: The repository 'https://apt.repos.intel.com/mkl all InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: https://apt.repos.intel.com/ipp all InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1A8497B11911E097
By the way I tried to email otc-digital-experiences@intel.com as mentioned on https://software.intel.com/en-us/faq and it came back as undeliverable.