Similar to OpenVPN
Cryptomator
CryptomatorCrypTool
CrypToolEncFS
EncFSEncrypting File System
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HyphanetGenode
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HushmailI2P
I2PJami
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Microsoft Outlook
Microsoft OutlookNaCl (ソフトウェア)
NaCl (software)Network Security Services
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Pretty Good Privacy
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S/MIME
S/MIMESecure Shell
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Signal ProtocolSilent Circle
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SSLeaySyskey
SyskeyThe Guardian Project (ソフトウェア)
Guardian Project (software)