Crime

Technology is always advancing, this seems great but there is a side effect of new crimes being created.

Spamming
Spamming is where a company or someone constantly sends you pointless, or even harmful content, but most of the time advertising. The most common type of virus to come through an online message is usually a Trojan, which is where an attachment is created that carries the disguise of something that would do no harm but then once it’s in your system it will corrupt your computer and can do a whole host of bad things. Spam can also look like trusted companies that ask for your data and so they can steal all your money and even sell your details to other people.
Advancements in programming make it harder for spam to reach you but it shoots itself in the foot when these advancements also make it easier to send spam as well.

CCTV and other crime proventing technologies.
CCTV stands for closed circuit television and is a small camera usually placed high up or on posts over a town, most of the time in places people aren’t usually seen to be. This raises issues concerning the privacy of the public but on the other hand it makes it more awkward to do illegal things.  

Other

Mobile phones make it easier to report a crime just by dialling 999. However, mobile phones can also be hacked by other phones and can carry valuable data that can be sold and misuse. A common example of mobiles being used in crime is that most drug dealers will have 2 mobiles. One for personal use and one for dealing, in order to deter the police. Phones can be traced to location through making a simple call to make catching criminals easier.

How e-mail Works

Where it Started

• The first e-mail was sent in 1971, when Ray Tomlinson sent a message successfully from one computer to another. In order to differentiate messages between users on the same computer from e-mail messages to users on other computers, Ray used the @ symbol. You used the username followed by @ and the address of the recipient computer. Although we no longer strictly tie e-mail address to places in exactly the same way, this was the basis of what e-mail is.

Preparing the Message

• E-mail starts with your e-mail client, which is the software or web interface you use to compose e-mail messages. First you need to add a header, a header requires a to and from address. Like a postmark, it stores the date and time an e-mail was sent. The header also shows you if there is an attachment, and what format the message is in. How it’s encoded.

Communicating With Your E-mail Server

·        If you’re using software such as Outlook or Mac OS X Mail etc then you’ll need to set it up to communicate with your e-mail provider and then also input the recipient’s address.

You enter two different server addresses in the setup because there is often a different server for sending and one for receiving. This is because a different protocol, or system of communication between servers, is required for each operation. For sending e-mails, a protocol called SMTP (Simple Mail Transfer Protocol) is commonly used. This protocol tells your e-mail client how to communicate with the server so it can transmit the e-mail. At this point, the information in your e-mail message is sent from your computer or web client to the SMTP server.

Transmitting to the Recipient's Server

• The SMTP server looks at the header of the message, and determines the address of the server where the recipient's e-mail account is located. Using the Internet, your SMTP server connects with the recipient's server and transmits the message. The message then goes into the e-mail inbox of the recipient, where it stays until an e-mail client downloads it, or until the message is viewed using a web interface.

Receiving E-mail

• When the recipient of your e-mail wants to send a message back, the return message follows the same path, but in reverse. When you check your e-mail using your mail client, it usually uses another protocol, POP3 (Post Office Protocol 3) to communicate with your e-mail server and request the message. The reply message is downloaded and displayed on your screen.

Sources:

http://www.oasis-open.org/khelp/kmlm/user_help/html/how_email_works.html

http://openmap.bbn.com/~tomlinso/ray/firstemailframe.html

http://www.youtube.com/watch?v=YBzLPmx3xTU