code: func (c *Conversation) SecureSessionID() (parts []string, highlightIndex int) {
  	l := fmt.Sprintf("%0x", c.ssid[0:4])
  	r := fmt.Sprintf("%0x", c.ssid[4:])
  
  	ix := 1
  	if c.sentRevealSig {
  		ix = 0
  	}
  
  	return []string{l, r}, ix
  }
docs: // SecureSessionID returns the secure session ID as two formatted strings
  // The index returned points to the string that should be highlighted