Can I use a CSR with a 1024-bit key length?
Article Number: 000071010
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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