Spelling fixes
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@ -9,14 +9,14 @@ Unlike in relay-based schemes where the groups assign a leader, set of
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offline) - untrusted infrastructure has a goal of realizing those properties
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offline) - untrusted infrastructure has a goal of realizing those properties
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without the assumption of trust.
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without the assumption of trust.
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The orignal Cwtch paper defined a set of properties that Cwtch Servers were
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The original Cwtch paper defined a set of properties that Cwtch Servers were
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expected to provide:
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expected to provide:
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* Cwtch Server may be used by multiple groupsor just one.
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* Cwtch Server may be used by multiple groups or just one.
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* A Cwtch Server, without collaboration of a group member, should
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* A Cwtch Server, without collaboration of a group member, should
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never learn the identity of participants within a group.
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never learn the identity of participants within a group.
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* A Cwtch Server should never learn the content of any communication.
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* A Cwtch Server should never learn the content of any communication.
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* A CwtchServer should never be able to distinguish messages as belonging
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* A Cwtch Server should never be able to distinguish messages as belonging
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to a particular group.
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to a particular group.
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We note here that these properties are a superset of the design aims of Private
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We note here that these properties are a superset of the design aims of Private
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@ -40,14 +40,14 @@ guarantee more efficient properties by relaxing trust and security
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### Detectable Faults
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### Detectable Faults
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* If a Cwtch server fails to relay a specific message to a subset of group
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* If a Cwtch server fails to relay a specific message to a subset of group
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members then there will be a detectable gap in the message tree of certain
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members then there will be a detectable gap in the message tree of certain
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peers that can be discovered through peer-to-peer gossip.
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peers that can be discovered through peer-to-peer gossip.
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* A Cwtch server cannot modify any message without the key material known to
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* A Cwtch server cannot modify any message without the key material known to
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the group (any attempt to do so for a subset of group memebers will result in
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the group (any attempt to do so for a subset of group memebers will result in
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identical behavior to failing to relay a message).
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identical behavior to failing to relay a message).
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* While a server *can* duplicate messages, these will have no impact on the
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* While a server *can* duplicate messages, these will have no impact on the
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group message tree (because of encryption, nonces and message identities
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group message tree (because of encryption, nonces and message identities) -
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) - the source of the duplication is not knowable to a peer.
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the source of the duplication is not knowable to a peer.
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## Efficiency
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## Efficiency
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