Revisiting the Practicality of Search on Encrypted Data: From the Security Broker’s Perspective

Table 1

Example of QQMail features in the library.

Application	Function	Request method	Request URI	Request content type	Encryption field	Encryption algorithm
QQMail	sendMail	POST	set3.mail.qq.com/cgi-bin/compose_send?sid=JIq-6XB24WTmf0ke	Key-value format	Subject content	AES-256
QQMail	receiveMail	GET	set3.mail.qq.com/cgi-bin/readmail?folderid=1&folderkey=1&t=readmail&mailid=ZC0010-3nAORN1KF5ITb1kOXm	HTML format	Response data	AES-256