Similar to FireWall-1
Openswan
OpenswanOphcrack
OphcrackPeer to Peer
Peer-to-peerPoderosa
Pretty Good Privacy
Pretty Good PrivacyProton VPN
Proton VPNProVerif
ProVerifPuTTY
PuTTYQubes OS
Qubes OSRiseup
RiseupRLogin
S/MIME
S/MIMESecure Shell
Secure ShellSecurity Support Provider Interface
Security Support Provider InterfaceSignalプロトコル
Signal ProtocolSilent Circle
Silent Circle (software)SSLeay
SSLeayStrongSwan
StrongSwanSyskey
SyskeyThe Guardian Project (ソフトウェア)
Guardian Project (software)TLS実装の比較
Comparison of TLS implementationsTox (プロトコル)
Tox (protocol)Tuta
Tuta (email)VeraCrypt
VeraCryptWhonix
WhonixWinSCP
WinSCPWire (ソフトウェア)
Wire (software)WolfSSL
WolfSSL