Thoughtful, detailed coverage of the Mac, iPhone, and iPad, plus the best-selling Take Control ebooks.

 

 

Pick an apple! 
 
Cull Graphics Quickly with Preview

You're faced with a folder full of images, and you need to sort through them, trashing some number and keeping the rest. For a quick way to do that, select them all, and open them in Preview (in Leopard, at least). You'll get a single window with each graphic as an item in the drawer. Use the arrow keys to move from image to image, and when you see one you want to trash, press Command-Delete to move it from its source folder to the Finder's Trash. (Delete by itself just removes the picture from Preview's drawer.)

 

 

Related Articles

 

 

Moving on to a New Challenge

Send Article to a Friend

In 250 days and with the combined efforts of some 4,000 teams of computers, distributed.net has completed the RSA Data Security Challenge to break a 56-bit RC5 encryption algorithm, demonstrating that groups of networked computers can break such encryption. Team members participated by installing client software on their computers. The client software communicated with centralized servers over the Internet to perform the math necessary to break an encrypted message. Before locating the key needed to decrypt the message, the teams analyzed 47 percent of the possible keys, some 34 quadrillion sequences. The encrypted message read, "It's time to move to a longer key length." Although many Mac users participated, including the Apple Evangelistas team led by Guy Kawasaki, the key was broken by Peter Stuer's Intel-based PC. Peter was part of the STARLab Bovine Team, primarily located in Brussels, Belgium.

Distributed.net has begun a 64-bit challenge and a Macintosh client is available via FTP as a 303K download; look for it also on the distributed.net Web site shortly.

<ftp://ftp.distributed.net/pub/rc5-64/v2.6401/ rc56401-macos.sit.hqx>
<http://www.distributed.net/rc5/>

Future plans for distributed.net include updating the client software to version 3, which will be smart enough to query client hardware to determine which computational tasks suit it best. Future tasks besides breaking encryption codes may include doing computational work for SETI (Search for Extraterrestrial Intelligence) and participating in the Mersenne prime number search. According to David McNett at distributed.net, although 68040-based Macs provide little CPU power to breaking RSA's encryption challenges, they should prove more useful in locating new prime numbers. David noted the Macintosh in general and particularly PowerPC-based Macs made a "very stunning" contribution to meeting the 56-bit challenge.

 

CrashPlan is easy, secure backup that works everywhere. Back up
to your own drives, friends, and online with unlimited storage.
With 30 days free, backing up is one resolution you can keep.
Your life is digital; back it up! <http://tid.bl.it/code42-tb>