Patent ID: 11968304
Assignee: NCHAIN LICENSING AG
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The method of claim 5, wherein the ephemeral keyshares are determined by the set of keyshare participants in a dealerless exchange, without the ephemeral key becoming known to any of the participants, wherein, in the dealerless exchange, each participant i of the set of keyshare participants Π provides, to each other participant j of the set of keyshare participants Π, a y-coordinate ƒi(xj) as derived by applying a polynomial share ƒi, secret to that participant i, to the x-coordinate xj assigned to that other participant j, and
the ephemeral keyshare ki secret to each participant i is derived as:, k
      i
     
     =
     
      
       
        f
        ⁡
        (
        
         x
         i
        
        )
       
       ⁢
       mod
       ⁢
       n
      
      =
      
       
        ∑
        
         j
         ∈
         Π
        
       
       
        
         
          f
          j
         
         (
         
          x
          i
         
         )
        
        ⁢
        mod
        ⁢
        
         n
         .