Off-The-Record Messaging (OTR) protocol implementation for python
This package implements the Off-The-Record Messaging protocol in pure python.
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/SHA-256 hash functions.
Features of the OTR protocol:
- End-to-end encryption: No one else can read your messages.
- Authentication: The correspondent’s identity can be verified.
- Deniability: The messages you send do not have digital signatures that can be checked by a third party. Anyone can forge messages after a conversation to make them look like they came from you, however during the conversation your correspondent is assured that the messages he sees coming from you are authentic and unmodified.
- Perfect forward secrecy: If you lose control of your private keys, you are assured that no previous conversation is compromised.
This package implements the version 2 and 3 of the OTR protocol. For more details see https://otr.cypherpunks.ca/