Hi Matt ! Thanks for your reply.
The modifications about the certificate we fixed in iOS 13 are described below: Set RSA keys sizes to 2048 bits.
Use a hash algorithm :SHA-2.
Others required in Requirements for trusted certificates in iOS 13 and macOS 10.15 - https://support.apple.com/en-us/HT210176.
The certificate still works well in iOS 13 when our app connects to our server. But in iOS 14, it can't connect and the APIs we used display errors as below:
[API] AFnetworkingerror.domain : NSURLErrorDomainerror.code : -999
[API] SRWebSocketerror.info : Invalid server certerror.code : 23556
I'm sorry about that I can't provide the certificate info. In my searching ,there are some new network protocols implemented in iOS 14. The list is described below:ipv6
http/3
TLS 1.3
Multipath TCP
Encrypted DNS
Are these protocols must implemented in our app and server?
Best Regards.
William0920
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