35327
Al-Kindi 's invention of the frequency analysis technique for breaking monoalphabetic polyalphabetic ciphers was the most significant cryptanalytic advance until World War II .
 Al-Kindi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Al-Kindi