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A type of HTTPS encryption called a Secure Sockets Layer (SSL).
A Domain profile offers the least security. A Private profile offers moderate security and a Public profile offers the highest security.
That will depend on which type of encryption you wish to use, there are many different types depending on the level of security desired.
"To achieve better USB security, it is recommended to use an encryption. This type of protection ensures data integrity if the USB drive is lost or stolen."
No. Most filesystems on Linux do not have encryption builtin, though you can have an ecryptfs-formatted partition on certain distributions that offer to encrypt your home folder. Most other filesystems while unencrypted, can rely on using LUKS as an encryption layer.
A: Symmetric
MessageLabs offers messaging and security services to clients. It was bought by Symantec in 2008, which now offers the Symantec.cloud service. This security system is a type of hosted security, where companies host their security systems "in the cloud" (they don't have to purchase individual software or hardware).
Domain profile
The most common application for encryption is in Internet browsing; whenever someone enters a "secure" website (indicated by shttp as the page protocol type) an encryption system is used to secure traffic between the user and the site.
It all depends on what type of internet you have. I know that Comcast offers free Norton security when you are one of their customers.
The most common type of computer data security is encryption. Many software options exist (TrueCrypt, SafeBit) that can encrypt the data on your computer so only authorized people can access it. For physical data security (for example, to help prevent a laptop from being swiped), many electronic retailers (BestBuy, Staples) sell laptop locks.
Retinal scans are considered to be the most secure forms of biometric security.