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Off-the-record Messaging (OTR) is a cryptographic protocol that provides encryption for instant messaging conversations. OTR uses a combination of AES symmetric-key algorithm with 128 bits key length, the Diffie–Hellman key exchange with 1536 bits group size, and the SHA-1 hash function.
An example of this is the Signal Protocol, which combines the Double Ratchet Algorithm, prekeys, and a 3-DH handshake. [7] The protocol provides confidentiality, integrity, authentication, participant consistency, destination validation, forward secrecy, backward secrecy (aka future secrecy), causality preservation, message unlinkability ...
The term "end-to-end encryption" originally only meant that the communication is never decrypted during its transport from the sender to the receiver. [9] For example, around 2003, E2EE has been proposed as an additional layer of encryption for GSM [10] or TETRA, [11] in addition to the existing radio encryption protecting the communication between the mobile device and the network infrastructure.
In November 2014, Open Whisper Systems announced a partnership with WhatsApp to provide end-to-end encryption by incorporating the Signal Protocol into each WhatsApp client platform. [25] Open Whisper Systems said that they had already incorporated the protocol into the latest WhatsApp client for Android and that support for other clients ...
Logo of OMEMO. OMEMO is an extension to the Extensible Messaging and Presence Protocol for multi-client end-to-end encryption developed by Andreas Straub.According to Straub, OMEMO uses the Double Ratchet Algorithm "to provide multi-end to multi-end encryption, allowing messages to be synchronized securely across multiple clients, even if some of them are offline". [1]
For example, WPA2 uses: DK = PBKDF2(HMAC-SHA1, passphrase, ssid, 4096, 256) PBKDF1 had a simpler process: the initial U (called T in this version) is created by PRF(Password + Salt), and the following ones are simply PRF(U previous). The key is extracted as the first dkLen bits of the final hash, which is why there is a size limit. [9]
Element (formerly Riot and Vector [13]) is a free and open-source software instant messaging client implementing the Matrix protocol. [14]Element supports end-to-end encryption, [15] private and public groups, sharing of files between users, voice and video calls, and other collaborative features with help of bots and widgets.
Download QR code; Print/export Download as PDF; Printable version; ... Pages in category "End-to-end encryption" The following 22 pages are in this category, out of ...