In the prison library, where inmates most ask for Westerns and romance novels, employees scour pages of returned books just to make sure there's not a message or code that could be passed along to another inmate.
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Many highly publicized attacks have been based on a tactic called "spear-phishing, " where email users are tricked into opening a legitimate-sounding message that contains code called malware that lets attackers penetrate corporate networks.
Select Comfort bought ads in local newspapers, which instructed users to send the company an SMS message with their zip code.
The FBI determined Keyes left behind no code or hidden message in his writings.
Anyone searching for the source code on file-sharing systems will see a pop-up message alerting them to the fact that downloading the code is illegal.
"That used to be the message that was in the highway code, " he said.
They send that code, via text message, to a toll-free phone number, and immediately receive a text back that indicates whether or not the drug is legit.
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If the user enters a phone number, he or she receives a text message asking for a reply with a registration code.
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Here, along with your username and password, you can set your Google account to ask you for a six-digit code that Google will send via text message to your phone.
Given the pager's limited message space, American teens have devised a special numerical code.
He says hidden in the code of Netsky-AC is a sarcastic message directed toward anti-virus companies, claiming responsibility for both.
Its mission is to broadcast the message "Hi this is Niwaka Japan" in Morse code, using bursts of intense light to draw dots and dashes across the heavens.
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Zipwhip were able to write computer code to interpret the instructions sent in via text message.
If the product code and date of production are obscured, send a message to the seller asking for more information.
When contacting the BBC, pasting this error message into your email, along with your IP address, post code and internet service provider information, will help us diagnose the problem.
The "two-factor" verification system, which will be optional, asks users to register a phone number, e-mail account and six-digit code that would have to be entered, via text message, each time they log in to the site.
You write a message, and Mixcard sends off a postcard to your recepient with a QR code for them to get their mixtape.
Four whole years ago and still it appears as if marketers would rather plan a campaign using Morse Code than do anything related to mobile and in particular, text message marketing.
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"The court was sending a message: Don't rely on the courts to clean up the tax code, '" says Lipton, who chairs the American Bar Association's tax section.
However, radio reception problems throughout the day on Thursday meant that the British code-cracking team did not get a full copy of the enciphered message until after 1700 GMT.
Printed inside the wrappers of the bars will be a code that can be sent back to a given phone number in an SMS message to see if it wins a prize.
Young -- editor of a local history group -- remains confident, going on to say that "It's not complex" and that much of the message relies on acronyms that became prevalent in WWI due to the short battery life of morse code systems.
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