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|Scenario Task Description=A secure If you want to have a private chat involves confidentiality between the conversing parties - conversation with someone, you need to make sure that no one else but you and the person/s you are chatting with can read your messages (confidentiality), that the transcript. It should also include authenticity - whereby all parties can be confident of person/s you are chatting with are really who they say they are chatting (authenticity) and that what you and the other people in the chat are writing is not tampered withby third parties (integrity). Theses properties are achieved through  In order to obtain all this, you need to use a tool offering end-to-end encryption and key verification. The chat record is not accessible to the As most service provider providers (e.g. Google, Microsoft, Yahoo, Facebook) and their respective chat software does not don't offer this serviceand can also read your chat record, it is a good idea to either use a chat service that provides encryption by default, or to use software for encryption if you need to use those services. Take a look at the [https://www.eff.org/secure-messaging-scorecard Secure Messaging Scorecard] from EFF to see how they rate various chat clients that claim security properties.

The standard for a secure two-party conversation is called [https://en.wikipedia.org/wiki/Off-the-Record_Messaging OTR - Off the record messaging] , and several popular chat clients support it, including Pidgin with OTR for [https://securityinabox.org/en/guide/pidgin/windows Pidgin with OTR] for Windows ] and [https://ssd.eff.org/en/module/how-use-otr-linux Linux], [https://ssd.eff.org/en/module/how-use-otr-mac Adium] for Mac, and [https://securityinabox.org/en/guide/jitsi/windows Jitsi] for all common desktop operating systems. The latter also includes secure audio and video conferencing. These clients can work with your existing accounts on Google, Facebook, Yahoo, etc. and encrypt the conversation over their respective networks.

Several chat clients are available as an add-on to your web browser, including [https://crypto.cat Cryptocat] and [https://mega.nz Mega]. Aside from that, several free messaging services offer similar encryption properties for messaging including [https://peerio.com/ Peerio] and [https://telegram.org/ Telegram]. All of the tools mentioned within tools are available as open source software and publicly disclose the encryption methods they employ in their software.