Post on 12-Jan-2016
The Internet
A Little About Me
• I’m a UNM graduate student • As well as an UNM alumni
and UNM employee• Born and raised in
Albuquerque• I have a house and 2 dogs!
Practice Using the Internet Safely
• Strangers exist online and not just in public face-to-face.
• People are not always who they say they are online.
• If it is too good to be true, then it probably is!
Practice Using the Internet Safely
• Be careful sharing personal information online.
• Remember viruses exist online through emails, websites, downloads, and web links.
• Don’t use the internet to bully other people.
Practice Using the Internet Safely
• Check with parents before downloading or installing anything on computer.
• Help your family members learn more about the internet.
• Use the internet with caution, it is a great resource, but we must be careful
Practice Using the Internet Safely
• Be aware of people nearby who are eavesdropping on your computer usage.
• Keep wireless networks password protected.
• Remember what you do online is an extension of yourself. Behave the same way you would in person.
Why Use Passwords?
• What are some things you have passwords for?
• When have you decided not to use a password on something?
• Give me an example of a time you didn’t use a password and it came back to bite you?
Passwords
• Don’t use a password that is easy to guess!
• Don’t use any personal information in your password!
• Don’t use a word in the dictionary as your password!
Passwords
• Don’t share your passwords except with a parent or guardian.
• Do use combinations of letters, numbers, and symbols.
• Make the password at least 8 characters long.
• For password hint questions make them tough!
Steganography
• What in the world is steganography?
• Is it the study of the Stegosaurus dinosaur?
Steganography
• People now will hide secret messages within files on the computer
Steganography
• Think of it is like having a secret room with information behind a bookcase rotating door.
Vigenere Cipher
• Giovan Battista Bellaso is credited with the introduction of the method all the way back in 1553.
• Blaise de Vigenere later received credit in the 19th century and we now know this method as the Vigenere Cipher.
Vigenere Cipher
• We take plaintext and with a keyword we cipher that original word into ciphertext.
• A=1, Now a keyword may have to repeat if the keyword is shorter than the plaintext.
Vigenere Cipher
Vigenere Cipher
• Here is a quick example:• Plaintext: CABIN• Keyword: BEEBE• (See I had to begin to repeat the keyword and add the letters “BE” again because the
keyword of “BEE” was shorter than the plaintext of “CABIN”)• Ciphertext: EEFJR• • Another example:• Plaintext: WAND• Keyword: BEST• Ciphertext: XEFW• • Your turn:• Plaintext: POTTER• KEYWORD: SIRIUS• Ciphertext: ???