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Poster: No safety in numbers: traffic analysis of sealed-sender groups in Signal. (arXiv:2305.09799v1 [cs.CR])
cs.CR updates on arXiv.org arxiv.org
Secure messaging applications often offer privacy to users by protecting
their messages from would be observers through end-to-end encryption
techniques. However, the metadata of who communicates with whom cannot be
concealed by encryption alone. Signal's Sealed Sender mechanism attempts to
enhance its protection of this data by obfuscating the sender of any message
sent with the protocol. However, it was shown by Martiny et al. that due to the
message delivery protocols in Signal, the record of who receives messages …
analysis applications data encryption end end-to-end messages messaging metadata numbers offer privacy protecting protection safety secure messaging signal techniques traffic traffic analysis