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Yahoo! Messenger (sometimes abbreviated Y!M) was an instant messaging client and associated protocol created and formerly operated by Yahoo!.Yahoo! Messenger was provided free of charge and could be downloaded and used with a generic "Yahoo ID", which also allowed access to other Yahoo! services, such as Yahoo!
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.
This implies that the sender and receiver of a message must agree on the same key before initiating communications, as is the case with symmetric encryption. For the same reason, MACs do not provide the property of non-repudiation offered by signatures specifically in the case of a network-wide shared secret key: any user who can verify a MAC ...
MSNP (Windows Live Messenger, etc.) MTProto Telegram Messenger LLP 2013 Aug Open standard: Phone number (e.g. +15550123), nickname (e.g. @example) Yes Yes No end-to-end encryption for group chats Yes No Yes Yes, contact blocking Yes Yes [14] Yes Yes Yes No ? MTProto Mumble: Thorvald Natvig 1999 Jul Open standard: Username Yes Yes No
Off-the-Record Messaging (OTR) is an extension of XMPP enabling encryption of messages and data. It has since been replaced by a better extension, multi-end-to-multi-end encryption (OMEMO, XEP-0384) end-to-end encryption between users. This gives a higher level of security, by encrypting all data from the source client and decrypting again at ...
Examples of such messaging services include: Skype, Facebook Messenger, Google Hangouts (subsequently Google Chat), Telegram, ICQ, Element, Slack, Discord, etc. Users have more options as usernames or email addresses can be used as user identifiers, besides phone numbers. Unlike the phone-based model, user accounts on a multi-device model are ...
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.
Silence is a free, open-source messaging encryption software, based on a fork from TextSecure software. It allows the secure exchange of SMS and MMS-type messages with other Silence or TextSecure users. The program allows message encryption and identity verification between correspondents by comparing the fingerprint of the encryption keys. [1] [2]