Reasons for both First Encrypt then Sign and First sign then Encrypt on which is better specific reasons? [closed]

When we want to send a message from A to B with confidentiality and non repudiation. I want answer and reasons for both the technique
1)
Why First Encrypt then sign is better ?
2)
Why First sign then Encrypt I’d better than 1)

Continue reading Reasons for both First Encrypt then Sign and First sign then Encrypt on which is better specific reasons? [closed]