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: ???