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SC573 security problem



		

			

									
					    mandrey
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 13, 2018 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    SC573 security problem
    
 
    I set public and private key in OTP memory using API functions. Then lock the device with function 'adi_rom_lock'. All functions returned 'true'. Then I reset the device. But device is OPEN. I can load unsecure programs to it and read OTP. I try to read lockbit in OTP memory location 0x48C: it is '1'. 
    
 
    I repeat this procedure at another chip with the same result. The chip revision is 0.0.
    
 
    The same procedure on Blackfin BF707 (it has the same security system) lock the part without any problem.
    
									
			        
		
    

				
						
        

    
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                 sc573 security problem
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      Thanks, that value indicates that the device has not been locked.
      
 
      Before we go into analyzing your code example may I request you verify the operations using the command line device programmer (cldp)? This utility allows you to perform various operations to SPI flash and OTP. You can find full instructions for the cldp within the IDE help content in the CCES help. A search for "cldp" will take you to the device programmer section.
      
 
      Once you verify content through the use of the cldp then we can look to perhaps share the code example you were using and identify the problem. Please ensure before sharing any code examples and CCES project files that you do not share any secrets.
      
 
      Regards
      
 
      Andy
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      Thanks, that value indicates that the device has not been locked.
      
 
      Before we go into analyzing your code example may I request you verify the operations using the command line device programmer (cldp)? This utility allows you to perform various operations to SPI flash and OTP. You can find full instructions for the cldp within the IDE help content in the CCES help. A search for "cldp" will take you to the device programmer section.
      
 
      Once you verify content through the use of the cldp then we can look to perhaps share the code example you were using and identify the problem. Please ensure before sharing any code examples and CCES project files that you do not share any secrets.
      
 
      Regards
      
 
      Andy
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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