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

Claim 2:
3. The signature device according to claim 2,
wherein the predicate information includes an element Ωj indicated in Formula 1, and
wherein the processing circuitry conceals an element of the attribute vector by the element Ωj, e
        →
       
       
        (
        
         L
         ,
         L
        
        )
       
      
      =
      
       
        ∑
        
         j
         ∈
         
          [
          m
          ]
         
        
       
       
        
         Ω
         j
        
        (
        
         
          
           x
           
            ρ
            ⁡
            (
            j
            )
           
          
          ⁢
          
           
            y
            →
           
           
            (
            j
            )
           
          
         
         +
         
          
           z
           →
          
          
           (
           j
           )
          
         
        
        )
       
      
     
     ⁢
     

     where
     ⁢
     

     
      
       
        
         e
         →
        
        
         (
         
          d
          ,
          i
         
         )
        
       
       =
       
        
         
          (
          
           0
           ,
           …
             
           ,
           0
          
         
         ︷
        
        
         i
         -
         1
        
       
      
      ,
      1
      ,
      
       
        
         
          
           
            0
            ,
            …
              
            ,
            0
           
           )
          
          ︷
         
         
          d
          -
          i
         
        
        ⁢
           
        for
        ⁢
           
        i
       
       ∈
       
        [
        d
        ]
       
      
      ,
     
    
   
   
    
     [
     
      Formula
      ⁢
          
      1
     
     ]
    
   
  
 

d is an integer of 1 or more,
 is an access structure expressed as an ASP representation,

=(={{right arrow over (y)}(j),{right arrow over (z)}(j)}j∈[m]⊂(qL)2,ρ:[M]→[N]),

n is the number of elements in an attribute vector, and
m,L are integers of 1 or more.