そうなんです。1Password の開発元である AgileBits は Dropbox の 2段階認証プロセスを有効にするのは少し待つべきだと言っているのです。 1Password users should wait a bit before trying Dropbox’s two-step verification | Agile Blog The bottom line is that I am recommending that 1Password users not be early adopters of this. Early adopters should: understand the data security gains and risks thoroughly (discussed below) take steps to reduce those risks (