Microsoft is deprecating 1024-bit RSA certificate support in Windows 10 and Windows 11 to boost security
Microsoft has quietly announced plans to deprecate TLS server authentication certificates using RSA keys with key lengths shorter than 2048 bits.
The change means that it will not be possible to use 1024-bit keys, although Microsoft is yet to reveal exactly when the changeover will start. This is important information for companies using aging hardware and software as it will mean weaker keys can no longer be used for authentication.