@Unpublished{Riv99d,
  author = 	 { Ronald L. Rivest },
  title = 	 { Unconditionally secure commitment and Oblivious Transfer Schemes Using Private Channels and a Trusted Initializer },
  date =         { 1999-11-08 },                  
  OPTmonth = 	 { November 8, },
  OPTyear = 	 { 1999 },
  keywords =     { bit-commitment, commitment scheme, unconditional security, trusted third party, trusted
                   initializer, oblivious transfer
                 },
  abstract =     {
        We present a new and very simple commitment scheme that does
        not depend on any assumptions about computational complexity;
        the Sender and Receiver may both be computationally unbounded.
        Instead, the scheme utilizes a ``trusted initializer'' who participates only
        in an initial setup phase. The scheme also utilizes private channels
        between each pair of parties. The Sender is able to easily commit to a
        large value; the scheme is not just a ``bit-commitment'' scheme.
        \par                  
        We also observe that 1-out-of-n oblivious transfer is easily handled
        in the same model, using a simple OT protocol due to Bennett et al.[2].                  
                 }
}