  Strong designated verifier signature schemes rely on sender-privacy to hide
the identity of the creator of a signature to all but the intended recipient.
This property can be invaluable in, for example, the context of deniability,
where the identity of a party should not be deducible from the communication
sent during a protocol execution. In this work, we explore the technical
definition of sender-privacy and extend it from a 2-party setting to an n-party
setting. Afterwards, we show in which cases this extension provides a stronger
security and in which cases it does not.
