Patent ID: 11888968
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 3:
4. The signature device according to claim 3,
wherein the predicate information includes an element Ω′j and an element Ω″j indicated in Formula 2, and
wherein the processing circuitry conceals an element of the attribute vector and the element Ωj by the element Ω′j and the element Ω″j, (
       
        
         
          (
          
           Ω
           j
           ′
          
          )
         
         
          j
          ∈
          
           [
           m
           ]
          
         
        
        ,
        
         
          (
          
           Ω
           j
           ″
          
          )
         
         
          j
          ∈
          
           [
           m
           ]
          
         
        
       
       )
      
      
       ⟵
       U
      
      
       
        (
        
         𝔽
         q
         m
        
        )
       
       2
      
     
     ⁢
     

     
      
       such
       ⁢
          
       that
       ⁢
          
       
        
         ∑
         
          j
          ∈
          
           [
           m
           ]
          
         
        
        
         (
         
          
           
            Ω
            j
            ′
           
           ⁢
           
            
             y
             →
            
            
             (
             j
             )
            
           
          
          +
          
           
            Ω
            j
            ″
           
           ⁢
           
            
             z
             →
            
            
             (
             j
             )
            
           
          
         
         )
        
       
      
      =
      
       
        
         0
         →
        
        L
       
       .
      
     
    
   
   
    
     [
     
      Formula
      ⁢
          
      2
     
     ]