In 1590, Viète discovered the key to a Spanish cipher, consisting of more than 500 characters, and this meant that all dispatches in that language which fell into the hands of the French could be easily read.
1590年，韦达发现了西班牙密码的解，它包括500多个字符，这意味着法国手中所有的密函都可以轻易破解。