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Old 04-03-2024, 07:14 PM   #16
rkomar
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You need to regularly update the certificates on a device if you want to use the web for general purposes. The trend is to go for shorter expiration dates, which means that devices with certificates that cannot be updated become useless even more quickly than before. For me, this is the number one problem with platforms that are orphaned by their manufacturers.
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Old 04-03-2024, 09:33 PM   #17
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Root certificates are valid for many years for this reason. The certificates on the websites themselves, that are signed by intermediate certs that are in turn signed by those root certs, are the ones that rotate regularly and have had their valid lifetimes shortened.
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Old 04-03-2024, 09:45 PM   #18
DNSB
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There have been quite a few root certificates that have been invalidated for key length issues and lazy sysadmins who did not keep up with the changes. Currently there is a move to 3072 or 4096 bit keys from 2048 bit keys and quite a few bits of software will no longer accept a 1024 bit certificate as being secure. If you are a developer and using code signing, you may remember that back in 2021, the minimum key length for a code signing certificate changed to 3072 bits.
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