Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
07/13/12 17:29
Read: 1137 times


 
#187927 - Password in EEPROM
Hi,
I am designing electronic lock for small safe. I got sample of one safe and it uses 89C51 and EEPROM 93C46, this is used for storing a four digit password.
I keyed in four digit password then I removed the 93C46 which contains password and replaced it with blank one, after switching on the system it was giving error signal, it means apart from password it also stores some data so it can recognized EEPROM.
Now I am designing the lock system using PIC16F886 and with changes in control logic and latest components. Since this PIC has inbuilt 256B of EEPROM. I want to know what prosecution required for this?
Please tell me logic to make safe more secure and easy. Suggestion required.

List of 13 messages in thread
TopicAuthorDate
Password in EEPROM      Arif Deshmukh      07/13/12 17:29      
   Checksum      Per Westermark      07/13/12 21:29      
      8-digit code      Per Westermark      07/13/12 21:36      
         Master Code      Arif Deshmukh      07/13/12 22:35      
            So what does the requirements spec say?      Per Westermark      07/13/12 22:47      
            master codes ....      Erik Malund      07/14/12 01:12      
               This is a low-security lock - or no measly 4-digit PIN      Per Westermark      07/14/12 01:18      
                  language      Erik Malund      07/14/12 08:48      
                     just a thought      Erik Malund      07/14/12 09:09      
                        Never give access when locked      Per Westermark      07/14/12 10:14      
                     PIN + PUK      Per Westermark      07/14/12 10:11      
   The eeprom doesnt hold the password      Jez Smith      07/14/12 19:57      
      High/low security        Per Westermark      07/14/12 23:10      

Back to Subject List