| U. Feige and A. Shamir, Witness Hiding and Witness Indistinguishability, STOC 1990. |
....principle which can be called secret hiding: design the system such that it has two secrets . In order to operate it, only one of the secrets needs to be known. However, to an outsider it should be indistinguishable which of the secrets is known. This principle was introduced by Feige and Shamir [10]. 3 The scheme In our scheme the public key of a user consists of three parts: two keys e 1 ; e 2 of an encryption function E and a random string R generated by some distribution. To send a message in this scheme, it should be encrypted according to each encryption key and a proof should be ....
U. Feige and A. Shamir, Witness Hiding and Witness Indistinguishability, STOC 1990.
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