Similar to Alpine_Linux

OpenSSL

Openswan

OpenVPN

Peer-to-peer

Pretty Good Privacy

Proton VPN

ProVerif

PuTTY

Riseup

S/KEY

S/MIME

Secure Shell

Security Support Provider Interface

Signal Protocol

Silent Circle (software)

SSLeay

StrongSwan

Syskey

Tails (operating system)

Guardian Project (software)

Comparison of TLS implementations

Tox (protocol)

Tuta (email)

VeraCrypt

Whonix

WinSCP