thanks,but  it`s not i want,code does not know the pid

The client and server use different SSL protocols. You can try changing the 1.3 in the SSL configuration in iris to the highest 1.2.

i got it，the code must like this "s baseStr = ##class(%SYSTEM.Encryption).Base64Encode(byteList,1)",len must be 24*n,and len1 must be 8*n