1. How Encryption for Strong Security Works Group Web Presentation Week13 s1160003 Katsushige Asahara s1160004 Haruka Anazawa s1160016 Junko Isii

2. Data Encryption Data encryption is the conversion of data into a form, called a cipher, that cannot be understood by unauthorized people.

3. File Encryption To protect files and folders from attackers, users use the Encrypting File System(EFS). The EFS is available in Microsoft's Windows 2000 and later OS. EFS works by encrypting a file with a symmetric key and a user's public key. To decrypt the file, user needs user's private key and the symmetric key.

4. Link Encryption The link encryption is a phased protection of the data that trade-off between two points in the network provided by encrypting data separately in each network link.

5. VPN The service that can use a public line as if it is a dedicated line. It is used for connection between the footholds of the network in the company, and it is cost-cut than I introduce a dedicated line into the backbone of the carrier by I “ride together”, and doing it.

6. Encryption program Encryption program,usually in firmware, use a string of numbers called a key to create a stream of data combining the real information.