Byte hexadecido aleatório vai

package main

import (
  "crypto/rand"
  "encoding/hex"
  "fmt"
)

func randomHex(n int) (string, error) {
  bytes := make([]byte, n)
  if _, err := rand.Read(bytes); err != nil {
    return "", err
  }
  return hex.EncodeToString(bytes), nil
}

func main() {
  val, _ := randomHex(20)
  fmt.Println(val)
}
Nutty Nightingale