Can I use a CSR with a 1024-bit key length?

Article Number: 000071010

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No. Recommendations from the National Institute of Standards and Technology (NIST) and mandatory requirements of the Microsoft Root Certificate Program state that certificates issued after January 1, 2011 should have a minimum key length of 2048 bits. To fully comply with these recommendations, all AffirmTrust certificates require a minimum key length of 2048 bits.

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