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Asymmetric Message Franking: Content Moderation for Metadata-Private End-to-End Encryption
message franking designated verifier signatures deniability
2019/5/28
Content moderation is crucial for stopping abuse and harassment via messaging on online platforms. Existing moderation mechanisms, such as message franking, require platform providers to see user iden...
Fast Message Franking: From Invisible Salamanders to Encryptment
authenticated encryption encrypted messaging
2019/1/9
Message franking enables cryptographically verifiable reporting of abusive content in end-to-end encrypted messaging. Grubbs, Lu, and Ristenpart recently formalized the needed underlying primitive, wh...
We pursue to formalize and instantiate a secure bidirectional channel with message franking properties. Under this model a sender may send an abusive message to the receiver and the latter wish to ope...
Private Message Franking with After Opening Privacy
message franking protocols abusive reports messaging applications
2018/11/7
Recently Grubbs et al. [GLR17] initiated the formal study of message franking protocols. This new type of service launched by Facebook, allows the receiver in a secure messaging application to verifia...
People Who Live in Glass Houses Should not Throw Stones: Targeted Opening Message Franking Schemes
message franking commitment encryption
2018/11/5
Message franking enables a receiver to report a potential abuse in a secure messaging system which employs an end to end encryption. Such mechanism is crucial for accountability and is already widely ...
Message Franking via Committing Authenticated Encryption
authenticated encryption encrypted messaging
2017/7/6
We initiate the study of message franking, recently introduced in Facebook’s end-to-end encrypted message system. It targets verifiable reporting of abusive messages to Facebook without compromising s...