最好的安全通讯工具

This is a ranking of encrypted messaging programs based on criteria aimed to assess whether they are well designed to make the content of the messages unreadable to anybody other than the sender and recipient. Keep in mind, even messages that are securely encrypted often do not obscure the identities of the sender and recipient. | Related article »

Name	Encrypted in transit?	Encrypted so the provider can’t read it?	Can you verify contacts’ identities?	Are past communications secure if your keys are stolen?	Is the code open to independent review?	Is security design properly documented?	Has the code been audited?	Score
Silent Phone	Yes	Yes	Yes	Yes	Yes	Yes	Yes	7
Silent Text	Yes	Yes	Yes	Yes	Yes	Yes	Yes	7
Signal / RedPhone	Yes	Yes	Yes	Yes	Yes	Yes	Yes	7
ChatSecure + Orbot	Yes	Yes	Yes	Yes	Yes	Yes	Yes	7
TextSecure	Yes	Yes	Yes	Yes	Yes	Yes	Yes	7
CryptoCat	Yes	Yes	Yes	Yes	Yes	Yes	Yes	7
Subrosa	Yes	Yes	Yes	No	Yes	Yes	Yes	6
RetroShare	Yes	Yes	Yes	Yes	Yes	Yes	No	6
Mailvelope	Yes	Yes	Yes	No	Yes	Yes	Yes	6
Off-The-Record Messaging for Windows (Pidgin)	Yes	Yes	Yes	Yes	Yes	Yes	No	6
Off-The-Record Messaging for Mac (Adium)	Yes	Yes	Yes	Yes	Yes	Yes	No	6
Jitsi + Ostel	Yes	Yes	Yes	Yes	Yes	Yes	No	6
Threema	Yes	Yes	Yes	Yes	No	Yes	No	5
Telegram	Yes	Yes	Yes	No	Yes	Yes	No	5
SureSpot	Yes	Yes	Yes	No	Yes	Yes	No	5
PGP for Windows Gpg4win	Yes	Yes	Yes	No	Yes	Yes	No	5
PGP for Mac (GPGTools)	Yes	Yes	Yes	No	Yes	Yes	No	5
FaceTime	Yes	Yes	No	Yes	No	Yes	Yes	5
iMessage	Yes	Yes	No	Yes	No	Yes	Yes	5
Wickr	Yes	Yes	No	Yes	No	No	Yes	4
iPGMail	Yes	Yes	Yes	No	No	Yes	No	4
Virtru	Yes	No	No	No	No	Yes	Yes	3
StartMail	Yes	No	Yes	No	No	Yes	No	3
BlackBerry Protected	Yes	Yes	No	No	No	Yes	No	3
WhatsApp	Yes	No	No	No	No	No	Yes	2
SnapChat	Yes	No	No	No	No	No	Yes	2
Google Hangouts/Chat "off the record"	Yes	No	No	No	No	No	Yes	2
Facebook chat	Yes	No	No	No	No	No	Yes	2
Yahoo! Messenger	Yes	No	No	No	No	No	No	1
Viber	Yes	No	No	No	No	No	No	1
Secret	Yes	No	No	No	No	No	No	1
Kik Messenger	Yes	No	No	No	No	No	No	1
Hushmail	Yes	No	No	No	No	No	No	1
Ebuddy XMS	Yes	No	No	No	No	No	No	1
BlackBerry Messenger	Yes	No	No	No	No	No	No	1
Skype	Yes	No	No	No	No	No	No	1
AIM	Yes	No	No	No	No	No	No	1
QQ	No	No	No	No	No	No	No	0
Mxit	No	No	No	No	No	No	No	0

Source: Research by Electronic Frontier Foundation, ProPublica, and Joseph Bonneau。

from  http://projects.propublica.org/graphics/privacy-tools