Very low entropy of code word and short english only word list.

[therealraven]

I notice that the word list is only 512 words.

This leaves log2(512^2)=18 bits of entropy for the use of 2 code words. Really it is 16 bits since words must alternate between even and odd for error detection.

Using a larger 2048 word list from the standard BIP39 word lists is an easy way to greatly increase this entropy, while adding multi-language support.

Due to the use of nameplates the chance of collision is low, but not the usual cryptographically-secure-astronomical-scale-chance-of-happening type of low that I would have expected.

• Without using the even-odd error detection this would increase 2 word entropy to 22 bits, up from the current 16 bits.

• It would be 33 bits with 3 words.

• The BIP39 word lists also have support for various languages other than english.

• These word lists are carefully selected so that 3 characters uniquely identifies every word, which is useful for auto completion.

[meejah]

While there may be good reasons to use other word-lists, the "lack of entropy" isn't an issue; see for example #359 or #191

For the internationalization / non-english aspect, please see magic-wormhole/magic-wormhole-protocols#31