Matt

I will go with using "extract" I guess to get a List of ints, then then dart:convert to get the String that I need: List byteArray = [72, 101, 108,...

``` @override String toString() => base64Encode(_bytes); List fromString(String str) => base64Decode(str); ``` This works, not utf8. Recommend baking it into the SecretKey class!

+1 for automatic sizing. The widget needs to be different sizes for different devices and platforms.