of this was the Tammie Marson case, where neighbours and anyone else might have been the culprit in the sharing of copyright files. Conversely, in other cases, people deliberately seek out businesses and households with unsecured connections, for illicit and anonymous Internet usage, or simply to obtain free bandwidth. Programs offering more security Secure instant messaging – Some instant messaging clients use end-to-end encryption with forward secrecy to secure all instant messages to other users of the same software. Some instant messaging clients also offer end-to-end encrypted file transfer support and group messaging. VoIP – Some VoIP clients implement ZRTP and SRTP encryption for calls. Secure email – some email networks are designed to provide encrypted and/or anonymous communication. They authenticate and encrypt on the users own computer, to prevent transmission of plain text, and mask the sender and recipient. Mixminion and I2P-Bote provide a higher level of anonymity by using a network of anonymizing intermediaries, similar to how Tor works, but at a higher latency. IRC and web chat – Some IRC clients and systems use client-to-server encryption such as SSL/TLS. This is not standardized. Government attacks on encrypted communications EncroChat Has been shut down. Sky Global / Sky ECC Taken down by law enforcement. Phantom Secure Taken down by law enforcement. See also General background Computer security Opportunistic encryption Communications security Secure messaging Software selections and comparisons Comparison of VoIP software Comparison of instant messaging clients Anonymous P2P Other Freenet Hepting vs. AT&T, a 2006 lawsuit in which the Electronic Frontier Foundation alleges AT&T Inc. allowed the NSA to tap all of its clients' Internet and Voice over IP communications NSA warrantless surveillance controversy Secret cell phone Unode References External links Secret broadcasting Internet privacy Espionage techniques