1. Encryption and Security Dylan Anderson Michael Huffman Julie Rothacher Dylan Anderson Michael Huffman Julie Rothacher

2. Encryption is the obscuring of information to make it unreadable without special knowledge, sometimes referred a scrambling now used in protecting many kinds of systems, such as the Internet e-commerce, mobile telephone networks, and bank automatic teller machines is the obscuring of information to make it unreadable without special knowledge, sometimes referred a scrambling now used in protecting many kinds of systems, such as the Internet e-commerce, mobile telephone networks, and bank automatic teller machines

3. Encryption Secrecy/Privacy other techniques are still needed to make communications secure, particularly to verify the integrity and authenticity of a message Message authentication code (MAC) Digital signatures Antother consideration is protection against traffic analysis other techniques are still needed to make communications secure, particularly to verify the integrity and authenticity of a message Message authentication code (MAC) Digital signatures Antother consideration is protection against traffic analysis

4. Encryption or Software code obfuscation is also used in software copy protection against reverse engineering, unauthorized application analysis cracks and software piracy used in different encryption or obfuscation software

5. Encryption Systems Computer encryption is based on the science of crytograph, which has been used throughout history. Most computers encryption systems belong in one of two categories: Symmetirc-key encryption Public-key encryption Computer encryption is based on the science of crytograph, which has been used throughout history. Most computers encryption systems belong in one of two categories: Symmetirc-key encryption Public-key encryption

6. Symmetric Key each computer has a secret key (code) that it can use to encrypt a packet of information before it is sent over the network to another computer.

7. Public Key uses a combination of a private key and a public key.

8. Public Key: Secure Sockets Layer (SSL) is a popular implementation of public-key encryption SSL is an Internet security rotocol used by Internet browsers and web servers to transmit sensitive information. It’s had become part of TLS is a popular implementation of public-key encryption SSL is an Internet security rotocol used by Internet browsers and web servers to transmit sensitive information. It’s had become part of TLS

9. Transport Layer Security (TLS) an overall security protocol In your browser, you can tell when you are using a secure protocol, such as TLS, in a couple of different ways: The “http: in the address line is replaced with “https” A small padlock in the status bar at the top of the browser window an overall security protocol In your browser, you can tell when you are using a secure protocol, such as TLS, in a couple of different ways: The “http: in the address line is replaced with “https” A small padlock in the status bar at the top of the browser window

10. Hashing Algorithms The key in public-key encryption is based on a hash value. This is a value that is computed from the base input number using a hashing algorithm. The hash value is a summary of the original value. It is nearly impossible to derive the original input number without knowing the data used to create the hash value. The key in public-key encryption is based on a hash value. This is a value that is computed from the base input number using a hashing algorithm. The hash value is a summary of the original value. It is nearly impossible to derive the original input number without knowing the data used to create the hash value.

11. Authentication is used to verify that the information comes from a trusted source. If information is “authentic,” you know who created it and you know that it has not been altered in any way since that person created it. There are several ways to authenticat a person or information on a computer is used to verify that the information comes from a trusted source. If information is “authentic,” you know who created it and you know that it has not been altered in any way since that person created it. There are several ways to authenticat a person or information on a computer

12. Ways to authenticate Password The use of a user name and password provides the most common form of authentication Pass cards These cards can range from a simple cad with a magnetic strip, similar to a credit card, to sophisticated smart cards that have an embedded computer chip Digital signatures A digital signature is basicllly a way to ensure that an electonic document (e0mail, spreadsheet, text file) is authentic. Password The use of a user name and password provides the most common form of authentication Pass cards These cards can range from a simple cad with a magnetic strip, similar to a credit card, to sophisticated smart cards that have an embedded computer chip Digital signatures A digital signature is basicllly a way to ensure that an electonic document (e0mail, spreadsheet, text file) is authentic.

13. Digital Signature Algorithm (DSA) is a type of public-key encryption method that Digital Signatures are based on. DSS is the format for digital signatures that has been endorsed by the U.S. government. DSA algorithm consists of a private-key, known only by the originator of the document (the signer), and a public-key which has four parts. is a type of public-key encryption method that Digital Signatures are based on. DSS is the format for digital signatures that has been endorsed by the U.S. government. DSA algorithm consists of a private-key, known only by the originator of the document (the signer), and a public-key which has four parts.

14. Checking for Corruption Another secure-computing need is ensure that the data has not been corrupted during transmission or encryption. A popular ways to do this are Checksum Another secure-computing need is ensure that the data has not been corrupted during transmission or encryption. A popular ways to do this are Checksum

15. Checksum is probably one of the oldest methods of ensuring that data is correct provides a form of authentication because an invalid checksum suggest that the sata has been compromised in some fashion. is probably one of the oldest methods of ensuring that data is correct provides a form of authentication because an invalid checksum suggest that the sata has been compromised in some fashion.

16. Source: http://computer.howstuffworks.com/encrypti on.4.htmhttp://computer.howstuffworks.com/encrypti on.4.htm Notice the “http” not “https”…not a Secure Sockets Layer (SSL) http://computer.howstuffworks.com/encrypti on.4.htmhttp://computer.howstuffworks.com/encrypti on.4.htm Notice the “http” not “https”…not a Secure Sockets Layer (SSL)