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Survey: email privacy and security. Cryptography in business? There are so few who can carry a letter of any. Cicero to Atticus, 6. BC. Some businesses began using strong cryptography about. They. seemed to do it in the half- instinctive way they used.

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Banks used DES (the US Data. Encryption Standard) to. ATMs. And any. business with a computer had some kind of password. It was. just done. No one made. much fuss about it. Little by little, things changed.

Very strong. cryptography left the shadows of. Business use of encryption will keep growing. There are. four main. Computers have changed greatly. Twenty- five. years ago most computers were. An electronic link to the outside was. And if there was a.

Security threats in. These threats were managed by keeping the. Today computers are here, there and everywhere. Victory Movie Watch Online.

Most computers are now connected into networks. So central management. Much. harder. 2. Messages and electronic files now move. There is no security on the. Internet. And even an. LAN can be broken into if there's just one. Faxes have proved hard to manage for.

It is. difficult to maintain a 'need to know' system when. Also, faxes are. sometimes sent to the. And fax interception is now technically. Some. fax systems are now. A smarter system is proving to.

A new sort of encryption system was born. RSA public- key. system. It elegantly gets around one of the main. With the RSA system, there are. The 'public key' can be sent down an insecure. It can only. be used to encrypt a message.

Once encrypted, only the. PC holds. the complementary 'private key' can decrypt the message. For all these reasons, encryption is spreading fast in. The US Chamber. of Commerce surveyed 1. US business users and found. They expect. this figure to rise to.

The 1. 99. 6 Ernst & Young and Information Week annual. In December 1. 99. Trusted Information Systems of. Glenwood, Maryland, listed. About 6. 0% were from the US.

Almost half of. the products used DES, the old standard. At their. annual conference in January 1. RSA Data Security. RSA public- key encryption systems to exceed. I have no figures for Australia.

But I suspect it isn't. Australia is more or less keeping pace with the US. Australians may love. America restricts export. Australia. Exceptions are made, but special US licenses have to be. This means. it usually isn't possible to buy off- the- shelf US.

US. And when it is. This means that many. Australian companies that. US (no serious disadvantage, as I will explain. Note, June 1. 99.

There's been a lot of change in. Strong encryption.

One way they. compete against US products is to. US export versions are deliberately. This report appeared on 1. June. 1. 99. 9: Growing. Foreign Encryption Products in the Face of U.

S. Export. Regulations, by the Cyberspace Policy Institute at. George Washington University.

It. lists. countries and a summary of their encryption products. Be. prepared to blink. There are lots of. Managers may first think all this is a matter for their. IT. departments. Not quite. Cryptography is a black art to.

IT people. (witnessed by some of the easily breakable encryption. This. innocence wouldn't surprise.

Which leads to questions about which products are. A light seems to go on for managers when they find out. How Internet email works. I will start slowly. This gets complicated pretty fast. First, most business people have heard that the Internet. This applies to Internet email - - a swift.

Maybe too friendly looking, considering. An email 'address' typically looks like gsmith@ibm. The general form is.

IPaddress. 'Somebody' identifies the person the email is for. In an. organisation, the. George Smith. It is customary to. The IP (Internet Protocol) address is a 3. Nobody would want to type in long numbers as email.

Internet translation system that lets numerical. IP addresses be. written in mnemonic form as alphabetic characters. Something called the Domain. Name Service associates the mnemonic names for networks. IP. addresses that the computers on the Internet actually. Once an email is 'sent', it is launched down a complex.

It goes from one computer to. The computers connected to the Internet work according. TCP/IP' (Transfer. Control Protocol/ Internet Protocol). But there are many. Internet. protocols at work besides just those two. One of the. other protocols is the.

Simple Mail Transfer Protocol (SMTP). A UNIX program. called Sendmail is active. Internet computer that takes on the. A lot of. Sendmail's work amounts to taking email from the In. Out basket. The email arrives at a computer, and. Sendmail just redirects it. An email can make a lot of hops.

And the path can be. Perth to Melbourne in. Australia might include a hop in. Watch Storm War Megavideo there.

Singapore or Los Angeles. At the end of the line, when the email gets to its. The Post Office Protocol (POP) saves. PC is connected at the time. The Internet email system is fault- tolerant and. And it doesn't matter.

Messages can be. sent between Macs, PCs, UNIX machines, and mainframes. Most messages arrive in. Security risks with email. Ordinary mail that goes in an envelope can be tampered.

It sometimes. happens. But there's no feasible way to scan the. But with email, there. And certain people and organisations. I mentioned that email usually passes through several. There is no technical obstacle to stop.

Software can search for keywords, for. The 'interesting' emails can. The people sending and. A similar thing can be done by hackers. They can plant. passive software (a. Then receive. copies of all the email the sniffer selects: maybe the. Some hackers do this as a kind of sport.

Fourteen- year- old hacker caught. Others have a less. This. goes on day and night, and will continue. Email interception is one danger. There are also email.

People get forged. It is easy to fake the sender's name and. If the person getting the faked email is taken in. Encrypted email can be completely secure. John wants to send an email message to Herman, his.

Germany. John types the message on his screen (or gets. When the message is worded the way John. It verifies the. name of the person he wants to encrypt to - - Herman - -. John has 'public keys' for. The encryption software. Herman's public key. Result: a digital mess that can.

Herman's private key. In Germany, the scrambled message pops up in Herman's. He selects the. 'decrypt' option on his mailer. The software asks him.

He. types this in, and that decrypts his private key (a very. Enormous. calculations then take place and Herman's software. John's software. And John's original message appears on.

Herman's screen. But what if John's message were intercepted by Black. Hat? It would do Black Hat. Watch Natural Born Killers Streaming. It's hopeless to unscramble the message. Herman's. private key, and Black Hat doesn't have that. And Black. Hat can't work out.

Herman's private key by knowing what his public key. No one can. Which.

It is theoretically possible to calculate the. Even if Black Hat ran the fastest computer on the. This. isn't exaggerating.).

And there's something else. If John wants to, he can add. It's like a mathematical watermark that. Herman's software. Herman can be sure that the message.

John, not from. someone impersonating John. After all, anyone can send. Herman an encrypted. Herman's public key. That's what it is.

Anyone could. say they are John. But only John can digitally. John's public key.

The digital signature also proves the message hasn't. John. signed it. Even one extra blank space anywhere, and. Herman's software would. Digital signatures are as secure as the encrypted. They cannot. be faked - - not in any 'computationally feasible' time.

Why encrypted email is better than faxes. Two security problems with faxes are obvious: They are sometimes sent to the wrong number by. The correct fax. number can be transposed, or simply the wrong number. And there can also.

A fax can be read by anyone who happens to be near. In some. offices, the 'need to know' principle reigns. But it's. hard to enforce. Instead, people. resort to phoning the person they want to fax, making. A third security risk is less obvious: interception. A. fax line can be bugged.