Secure communication

Hypertext Transfer Protocol Secure (HTTPS) is an extension of the Hypertext Transfer Protocol (HTTP). It uses encryption for secure communication over a computer network, and is widely used on the Internet. In HTTPS, the communication protocol is encrypted using Transport Layer Security (TLS) or, formerly, Secure Sockets Layer (SSL). The protocol is therefore also referred to as HTTP over TLS, or HTTP over SSL.

privacy-focused encrypted messaging app

cryptographic paradigm involving uninterrupted protection of data traveling between two communicating parties

intentional or unintentional release of secure information to an untrusted environment

certificate authority launched in 2015

free and open-source end-to-end encrypted email software and host

distributed protocol for telephony and instant messaging

a stopgap security protocol used in the IEEE 802.11 wireless networking standard; was deprecated in the 2012 revision of the 802.11 standard

international police sting operation between 2018 and 2021

Encryption protocol for Wireless LAN

instant messaging client

TLS extension, where a client states the hostname at the start of the handshake so that a server can present multiple certificates on the same address/port; so it can serve multiple HTTPS sites at the same IP address with different certificates

Retroshare is a free and open-source peer-to-peer communication and file sharing app based on a friend-to-friend network built by GNU Privacy Guard (GPG). Optionally peers may exchange certificates and IP addresses to their friends and vice versa.

browser extension for making web browsers use HTTPS instead of HTTP when possible

protocol for automating interactions between certificate authorities and web servers

Mailfence is a Belgian encrypted email service with a focus on security and privacy that offers OpenPGP based end-to-end encryption and digital signatures for usage in emails. It was launched in November 2013 by ContactOffice Group, which has been operating an online collaboration suite since 1999.

anonymous communicating between two entities

censorship circumvention technique

Set of algorithms that help secure a network connection

privacy oriented smartphone

network device that monitors the radio spectrum for the presence of unauthorized access points

Posteo is an email service provider based in Berlin, Germany, offering paid email accounts for individuals and businesses. The service gained prominence during the aftermath of the post-2013 global surveillance disclosures, especially for its high standard security features and relative anonymity as it does not require any private information in the registration process.

app for voice communications over VoIP protocol

encrypted instant messenger app (IM)

a way of transferring data that is resistant to overhearing

free software

cryptographic protocol for group communications

network protocol trilemma that no system of names in a network can be human-meaningful, secure and decentralised at the same time