Top Ten Security Need to Know

1. Limit personal information in email Backing Up Files Passwords Watch out for phishing, pharming & social engineering schemes/ recognize a hoax Determine if a website is secure Install/enable email filter & pop up blockers Use/install a firewall and anti virus protection Use/install Anti-spyware and how to check for spyware-malware-adware Recognize risks in wireless environments Review your Annual Credit Report Top Ten Security Need to Know

2. Session 3 Bar Codes

3. Review Rules for Strong Passwords

4. ReviewWhat are these? What do they do?

5. “captchas” http://blog.seattlepi.com/microsoft/archives/179415.asp

6. What’s this?

7. Bar Code

8. UPC Bar CodeUniversal Product Code

9. 1974 1st scan On display in Smithsonian –American History Museum

10. UPC Bar Code How does it work?

11. UPC Bar Code How does it work? • STEP 1: • Company applies to the Uniform Code Council (UCC) for permission • STEP 2: • pays an annual fee for UCC to issue “a code” 12-digit UPC code • TWO PARTS • The machine-readable bar code • The human-readable 12-digit UPC number

12. UPC Bar Code How does it work? WHAT IT IS The next 5 digits are the item number WHO IT IS 1st six digits is the manufacturing code—every company has their own Check Digit Lets the scanner determine if it scanned the number correctly or not.

13. 63938200039 3 • Add together the value of all of the digits in odd positions (digits 1, 3, 5, 7, 9 and 11).6 + 9 + 8 + 0 + 0 + 9 = 32 • Multiply that number by 3.32 * 3 = 96 • Add together the value of all of the digits in even positions (digits 2, 4, 6, 8 and 10).3 + 3 + 2 + 0 + 3 = 11 • Add this sum to the value in step 2.96 + 11 = 107 • Take the number in Step 4. To create the check digit, determine the number that, when added to the number in step 4, is a multiple of 10.107 + 3 = 110 • The check digit is therefore 3. 1 2-3-4-5-6-----7-8-9-10-11---check

14. What’s the Digit Check?

15. 04900001134 ? • Add digits in odd position • Multiple by 3 • Add digits in even position (don’t count the check digit) • Add answer from 2 and 3 • The check number will be the number when added to the answer to #4 which males it a multiple of 10

16. 04900001134 ? • Add digits in odd position • 0+9+0+0+1+4 = 14 • Multiple by 3 • 14*3 = 42 • Add digits in even position (don’t count the check digit) • 4+0+0+1+3=8 • Add answer from 2 and 3 • 42+8=50 • The check number will be the number when added to the answer to #4 which males it a multiple of 10 • 0

17. Another Piece of the Puzzle

19. How does the Computer Read (DECODE) it? The bar code starts with the standard start code of 1-1-1 (bar-space-bar). The zero is 3-2-1-1 (space-bar-space-bar). The four is 1-1-3-2 (space-bar-space-bar). The three is 1-4-1-1 (space-bar-space-bar). The next three zeros are 3-2-1-1 (space-bar-space-bar). In the middle there is a standard 1-1-1-1-1 (space-bar-space-bar-space), which is important because it means the numbers on the right are optically inverted! The one is 2-2-2-1 (bar-space-bar-space). The eight is 1-2-1-3 (bar-space-bar-space). The one is 2-2-2-1 (bar-space-bar-space). The seven is 1-3-1-2 (bar-space-bar-space). The zero is 3-2-1-1 (bar-space-bar-space). The six is 1-1-1-4 (bar-space-bar-space). The stop character is a 1-1-1 (bar-space-bar). 0 = 3-2-1-1 1 = 2-2-2-1 2 = 2-1-2-2 3 = 1-4-1-1 4 = 1-1-3-2 5 = 1-2-3-1 6 = 1-1-1-4 7 = 1-3-1-2 8 = 1-2-1-3 9 = 3-1-1-2 Numbers = “space units”

20. DECODE this program from MW • to start • t1, clickon • t2, clickon • end • to pause • t1, clickoff • t2, clickoff • end • to reset • t1, setpos [-338 -29] • seth 80 • end • to win • if touching? “t1 “t2 • [announce [Got it! You have qualified for the next level!] next t2, clickoff stop] • end • to blink • repeat 3 [t2, ht wait 10 t2, st wait 10 t2, ht] • end