Art Garage Sale

Alan Reiter was approached by a state arts commission that’s interested in exploring the possibilities of using WiFi for the “arts.”

” With WiFi, you could download audio or video. Listen to interviews of authors, artists, actors. View pictures and photographs on display. Perhaps even view made-for-WiFi “movies” that are relevant to the specific community.

There are lots of possibilities and no end to the ideas. But you still have to create reasons for people to carry WiFi-enabled PDAs and laptops. Indeed, would anyone (besides me!) carry a device to an WiFi-enable “art” community? Of course, there also could be WiFi-enabled kiosks for the public.”

Anyone with experience in using 802.11 for art-type applications is invited to send him thoughts, ideas and experiences. His e-mail address is:

Some sort of public interaction might involve wireless LANs.

Maybe a Blue Man Group performance instrument, a float, a talking kiosk, or an interactive sculpture. Say “hello” to kinetic sculpture. The Dialtone Symphony (.ram) was a concert performance in which all of the sounds are wholly produced through the choreographed ringing of the audience’s own cell phones.

A small research loft/lab might rent for $300/month and include computers, wireless networking, sensors and construction materials. It would be located for easy accessability and creative cross fertilization. It could eventually do contract work for architects, artists and designers.

Some related stories in Daily Wireless include:

Below is a list of links from my InteractiveSculpture web site at Personal Telco.

Take your pick. These are not organized in any coherent fashion; some links are dead and others are just broken but might be repairable. No refunds or guarantees. Rumage around and you might find some goodies.

Prototyping in cardboard with a bill of materials under $20 might be a good start. Computer control optional at extra cost.

Imagine something never imagined. Add social/political context. Apply the latest biochips, sensors and medical electronics outside the box. Stimulate imaginations. Fuse emotional content then abstract it. People will think you’re a genius. Artificial Artist, Mobiles, Human Powered Vehicles, Killer Tomato, Kinetic Sculpture Race, City Repair Projects, BBC: Make Your Own Soundscape, Cool DJ, E-Jay Software, Video Synthesizer , VJ Performance Synthesizer , Body Synthesizer, Michael Curry Designs , Panasonic Wireless Network Camera , Portland Taiko , USB External Sound Blaster , DaVinci Days , Oregon Historical Society’s Narrated Neighborhood Tours , Portland Visitor’s Assoc’s Self-Guided Tours , Portland Metro Maps, Linux Kiosks , , About: Art/Technology , Blue Man Group , Ken Butler , Stephen Cohen sculptural percussion ,, The Kitchen, Cow Parade, Measurement Computing, Vernier Sensors, Mediamation , Opto22, U/Oregon Jeffery Stolit , Corvallis KSR , Chunk 6-6-6, DaVinci Days , Regional Arts Counci , Open Studios , Oregon Art Beat Archives, Kinetic Sculpture, Artificial Artist , woodthatworks , Rolling Balls , Kinetic Race , MIDI controlled sculpture , Norman Tuck , Art and Robotics, Arts Electronica , Transmediale.02 , DJ Magazine e VJ performance instrument/synthesizer Live club VJ video clip Auto-Illustrator.


Balloon Sculpture, Commercial Balloons , Balloon Links , Tree Sculptures , Interactive Plant Growing , Sculpture Net, Good ideas , MIDI controlled Art Installations , MIDI Controllers , Harmony Central , Controller Zone Wind Syntesis Association, MIDI Software For Linux , Body Synth , Laser Projection , Non Tactile, Electronic Art Sites, Roll Your Own Dance/Tech , MIDI Workshop , No Moving Parts , Cybiko, Burning Man Camps , Luminesent Wire , Art , Wacky Willys, Cockeyed , Peppermint , Billboard Liberation Cacophony , Artists and Robots , Art and Technology , MIDI on Palm , Palm midi , Audio on PocketPC, Pocket Player, Linux MIDI software , Palm Theremin, MIDI-out port , Palm Music , Handheld Music , Yamaha Synth Products , Laser MIDI Controller Harmony Central, Midi Chat , Intermusic , JL Cooper, X-10, Home Toys Tricks, Home Controls , Smart Home, Home Automation Forum, Linux Home Automation, Sony Aibo Aibo Robot Programming,, Lego Mindstorms, Robot Links, Seattle Robotic , Robots in Portland , Toy Robot Initiative, NW Cyber Artists MIDI Light Controllers , MIDI controlled dimmer pack , Hobbytron , TEchno Stuff, , Robotics FAQ, Wireless Midi , Electronic Musician , Opcode USB Midi Port , Smart Fabric, Midi Links , Starrlab , CMU , Sonami Net, Biocontrol , Infernal Devices, IBVA, BigBriar , Optimusic , Saitek , Savi RF Id Tags, VCI’s Autonomous Sub monitoring , Brain Opera , Stanford Wearable PC, Radio Frequency ID Commercial Matchbox PC , Wearable WebRing , Experience Music: Geek Tour , AXIS 2191, 3D Zine, Shout 3D, 3D Mummy

3 D Body Scanners
3D Metrics 3D Scanners 3DV Systems
3D Cam 3D Minolta C3DTV
Alias Wavefront Cyberware Cyra Tech
Digibotics Dimensional Photonics Geometrix
GSI Lumonics Headus InSpeck
Mensi MetricVision Raindrop Geomagic
Paraform Perceptron Polhemus

Wi-Fi Protected Access

The Wi-Fi Alliance announced a new security standard, today. An IEEE standards effort called Wi-Fi Protected Access (WPA) will replace the existing WEP (Wired Equivalent Privacy) which has been proven to be insecure.

The WPA-based security solutions (pdf), is derived from and will be forward compatible with the upcoming IEEE 802.11i security standard. WPA combines TKIP encryption, an upgrade to WEP encryption, along with the latest authentication measures approved by the Wi-Fi Alliance. The Temporal Key Integrity Protocol (TKIP) will initiate key rotation every 10,000 bytes of data. The Wi-Fi Alliance will begin certifying WPA compliance in February 2003, although many of the major Wi-Fi manufacturers announced compliance today.

The earlier WEP security standard scrambled the messages between clients and APs. It’s based on an encryption algorithm generated from a key entered and controlled by the user. All clients and APs share the same key to encrypt and decrypt transmissions of data. WEP keys are 40, 128 bits, or more in length and must be manually entered into every client. MAC address filtering is often used together with this encryption. Unfortunately the key can be easily broken. A firmware upgrade to 128 bit WEP2 should work with most existing hardware but it uses RC4 encryption which is not very secure. By faking or “spoofing” the MAC address and running a simple program like Airsnort, which cracks both 40 bit and 128 bit (WEP-2) encryption, wireless LAN security can be broken.

An improved security system, 802.1x, distributes the encrytion keys in both directions (one up and one down). For encryption, the Advanced Encryption Standard (AES), a new encryption standard for WLANs is used. 802.1x requires a Radius server, not always practical for small networks, but it automatically changes codes, tharting hackers while using the hard-coded MAC address in every Ethernet card. Windows XP uses 802.1x and provides seamless travel between wireless access points.

Exploiting and Protecting 802.11b Wireless Networks is a hot topic. The 802.11 Security Web Page and Wireless Security Tutorial review Wireless Equivalent Privacy (WEP), 802.1X, and Virtual Private Networks (VPNs).

802.x is advised for businesses although researchers have found two security problems in the 802.1x standard that enabled them to hijack user sessions and execute man-in-the-middle attacks. The IEEE 802.1x working group is in the process of fixing the problems now. 802.1x is based on EAP (Extensible Authentication Protocol) and can use RADIUS (Remote Access Dial-in User Service).

Cisco’s propietary LEAP authentication, is an 802.1x authentication type that uses a log-on password. When a wireless access point communicates with a Cisco LEAP-enabled RADIUS server, Cisco LEAP provides access control through mutual authentication between client devices and the wireless network and provides dynamic, per-user WEP keys to help protect the privacy of transmitted data.

Cisco’s LEAP has been adopted by Atheros and is integrated into all of Atheros’ second-generation chipsets including the 802.11a/g/b dual-band solution. Atheros is also integrating WPA with even stronger encryption via the Advanced Encryption Standard (AES) for enterprise and government level security.

Public Wi-Fi networks, with practical operational issues, make securing a public system with an approach like 802.x, a logistical and operational nightmare. Without registering each user, it’s difficult to provide tight security. XtremeTech reviews security options while O’Reilly points out Seven Security Problems of 802.11 Wireless.

Hopefully, the new Wi-Fi Protected Access standard will provide some of the convenience of WEP with additional security. The IEEE security standard, 802.11i, isn’t due to be ratified until September of 2003. At that time, WPA version 2.0 should be fully compliant with 802.11i. The Alliance hopes to eventually require all Wi-Fi products to have WPA security turned on by default. Currently the default in most Wi-Fi products is “off”.

Bad idea. Last weekend’s World Wardriving II, in more than 30 cities around the globe, was a kind of pub crawl for computer geeks. A week of demonstrations, by grass-roots computer security activists collected data that shows hundreds of unsecured networks exist in major world cities.

T-Mobile Adds Airlines Hot Spots

T-Mobile HotSpot service, in over 1,800 locations, including Starbucks, Borders bookstores and cafes, airports and airline clubs, is adding American Airlines, Delta Air Lines and United Airlines to its ‘Wi-Fi’ menagerie.

The partnerships between T-Mobile and American, Delta and United is build upon T-Mobile’s existing service in more than 40 airport locations across the country. T-Mobile will use T-1 backbones which can accommodate streaming video and multi-media conferencing. T-Mobile’s AirCard 750 is a GPRS PC Card that provides 20-40kbps over T-Mobile’s GSM network.

T-Mobile’s $200 Sidekick uses GPRS for messaging (and voice) while their $550 PocketPC/Phone, which also uses GPRS, has an SD slot. It might use a 802.11b SyChip for “hot spot” access next year. Whether T-Mobile plans to take voice indoors using RadioFrame’s software defined “blades” is still unclear.

Showtime for Mobile Wireless

Monet Mobile Networks, today officially announced the commercial launch of Monet Broadband, “the nation’s first high-speed, mobile Internet service” in Duluth, MN. Monet offers subscribers unlimited Web access, three e-mail addresses and 5MB of data storage for $40 a month. For $60 a month, subscribers get unlimited Web access, five e-mail accounts and up to 25MB of storage.

CDMA2000-based, 1xEV-DO, (1x Evolution – Data Only), is a high-speed cousin of the 2.5G system (CDMA2000 1X), which Sprint and Verizon launched earlier this year. That service provides an always-on connection with data rates comparable to dial-up as well as voice communications.

The data-only 1xEV-DO system provides peak rates of over 2 Mbps, with an average throughput of 300 -700 kbps – comparable to wireline DSL services. Verizon began testing 1xEV-DO in San Diego and Washington DC this June. It uses only 1.25 MHz of spectrum so it fits in current PCS channels. Applications in high-speed mobile and Fixed Wireless Internet are projected. UCSD’s CyberShuttle uses 802.11b inside the bus while 1XEV-DO provides a 2.4 Mbps backbone – even at 65 miles per hour.

IPWireless uses a similar CDMA technogy over the MMDS band. While conventional UMTS systems use frequency-division duplex (FDD) or “paired” spectrum, the IPWireless system operates over time-division duplex (TDD) or “unpaired” spectrum. Data-only TDD systems are more spectrally efficient than FDD systems, because they use one channel for both upstream and downstream traffic rather than two.

Monet offers high-speed, mobile internet access using 1xEV-DO CDMA in the licensed PCS band (at 1.9 GHz) but it doesn’t provide voice services. Voice delivered over Internet Protocol (VOIP) is a service that is probably at least a year away.

“With Monet people can go outdoors, travel across town, move from room to room or anywhere in our network, and still have access to the Internet experience they have come to depend upon from their computers at home, school or at work,” said George Tronsrue III, chairman and CEO, Monet Mobile Networks.

“QUALCOMM congratulates Monet Mobile on the launch of the nation’s first commercial 1xEV-DO network,” said Dr. Irwin Mark Jacobs, chairman and CEO of QUALCOMM. “This launch exemplifies what 1xEV-DO technology brings to business and residential users – fast, affordable wireless access to the Internet. 1xEV-DO’s flexibility, high-speed, ‘always-on’ features make it ideal for enabling wireless Internet access in fixed, portable or mobile environments.”

LG Electronics is providing the network infrastructure. LG has leveraged its experience in South Korea to support the commercial launch of Monet Broadband in the United States.

Monet will upgrade its existing networks in Sioux Falls, S.D., Fargo, and Grand Forks, N.D., Moorhead, MN and Eau Claire, WI to 1xEV-DO in November. The company offers its high-speed, mobile Internet service to small and mid-sized markets that have a high Internet penetration, but limited access to broadband.

Customers can use Monet Broadband by installing the GTRAN DotSurfer 6200. Wireless PC card modems will be compatible with desktop, laptop and handheld PCs. Both Monet and IPWireless reportedly plan to use PC Cards equipped with SIM cardholders for roaming. The GTRAN modem costs $330; but with one year of service, the modem’s cost drops to $100. Proxim and Ericsson will jointly develop SIM-based authentication for public WLAN access. All Monet needs is a CDMA operator like Sprint or Verizon to cough up some spectrum for mobile, high-speed wireless. Easier said than done.

Using cellular frequencies to deliver high speed data could be risky business. Frequencies are hard to come by in urban areas. Worse, while some 50 voice users may use a single cellular channel (with an average monthly bill over $50), the same frequency could easily get hogged by one data-user at home.

Competition from “4G” systems like Arraycomm, Flarion, NextNet and IO Span use variations on COFDM. Some analyists believe OFDM is favored for the future because it is more spectrally efficient and handles multipath better. Flarion’s flash-OFDM PC Card, for example, claims hand-off to Wi-Fi networks, lower costs and higher speeds.

Picking winners is probably premature but bets are being placed. It’s showtime for mobile wireless.

Software Defined Radio

Darrin Eden, a fan of software defined radio says, “I don’t remember seeing anyone post this so… Open-Source Reference For Software Defined Radio is an oldie, but goodie. The location of the page for the code is here. Can you say Radio Virtual Machine?”

Software defined radios provide a solution to interoperability through software programability. Different radios, using different frequencies and modulations, can “redefine” themselves – on-the-fly – and “talk” to each other.

The idea grew out of the MIT SpectrumWare project, which in 1996 produced the first working software radio outside the military. Two years later, Vanu Bose, son of Amar Bose, the legendary designer of speakers and five friends took $200,000 of their own money and set up a small company called Vanu Inc. in Cambridge, Massachusetts, to commercialize the technology.

In the fall of 1998, Boeing asked the firm to join its consortium, which was competing for the military’s Joint Tactical Radio System project to create a single radio architecture for all of the US armed services.

Scientific American has a brief summary: “The hardware allows us to select any 10-megahertz region of the spectrum, convert it to intermediate frequency and then relay the signal to the RAM of an ordinary personal computer. All the signal processing is done on a general-purpose microprocessor, using a standard operating system”.

Companies like Equator Technologies are developing embedded technology that is soft-coded rather than hard-coded. Industry-standard operating systems like Linux are used. Equator’s MAP-CA and BSP-15 DSPs, “move the central functions of digital imaging, communications, and media applications into software, enabling a revolution in product functions, flexibility, and time-to-market.” SiGe is developing ultra-low power and small-footprint communications chips that work with GPS, Bluetooth, and Wi-Fi.

Software Defined Radio is fast becoming practical. Nextel, for example, announced an agreement with a start-up, RadioFrame Systems. Their (12″x4″) device works with wireless voice and Wi-Fi networks.

RadioFrame claims that its standards-agonistic system can alleviate cellular network loads by using a software-defined radio. It detects and registers wireless users within an indoor facility. Calls for those users are forwarded to the RadioFrame minicell site instead of a standard, outdoor cell site. Nextel is trialing RadioFrame’s system. It provides indoor coverage for cellular providers as well as support for wireless LANs.

Which, I guess, brings up the question; is it possible that a software defined 802.11b/cellular “hot spot” could actually “hijack” a cellular call, route it through an all IP network, and deliver voice as well as data services?

With software defined radio, anything seems possible.

City Telecom Hangups

Portland’s city-owned telephone system will begin serving government offices next week, despite opposition from Qwest Communications. The Integrated Regional Network Enterprise (IRNE) fiber-optic lines run to city, county and state offices in the Portland area. But to complete calls, it needs a connection to the global telephone network.

The city currently pays Qwest about $2.5 million annually for phone service but would pay about $300,000 under the wholesale arrangement. The city hired AT&T to connect IRNE to the global telephone network after Qwest refused to provide the connection in a dispute over wholesale prices. Qwest thinks the city should pay retail since it is not offering service to all potential subscribers.

Building municiple community LANs should be easy when fiber networks like IRNE are around. Metropolitan Ethernet provides, simple, inexpensive architecture while Resilient Packet Ring (RPR) represents compromise between SONET and Ethernet interests (using a redundant ring).

SwitchPoint’s fiber-to-Ether hubs are used by Wide Open West to deliver 10-100 MBps to consumers for $19.95/month. Cisco 1200 hot spots in nearby buildings (or parking meter kiosks) connect to SwitchPoint hubs on utility poles (or underground) at 100 mbps with ordinary (outdoor) CAT-5 cable. Alternately, Narad Networks transforms ordinary cable plant into a distributed, switched Ethernet network using DWDM on the fiber portion. It offers 1 Gig Ethernet on the main trunk and 100 Mbps to users.

Wi-Fi doesn’t really NEED to connect to the circuit-switched telephone network. Since frequency coordination is important, perhaps some sort of non-profit, academic organization could administer these city-wide networks. An independent entity might offer wireless ISP services from a variety of competitors. “Wireless DSL” rates might be comparable to those of more advanced nations – like South Korea.

Lane County Sheriff’s Office, has accepted a new corrections management system from Motorola. The Offendertrak Corrections Management System enables the County’s corrections, local police and justice agencies to quickly and efficiently capture, update or view jail and offender data. It’s part of Motorola’s extensive portfolio of integrated communications and information solutions for public safety and security requirements.

With approximately 17,000 offender lodgings and releases annually, Lane County needed help. Motorola responded with one of the industry’s most advanced inmate information systems and converted almost 600,000 existing inmate records.

“This is our future for corrections information,” said Lieutenant Mark Graham, project manager of the Offendertrak jail system. “Offendertrak will continue to grow with us and hopefully will meet our evolving needs for the next 10-20 years.” Offendertrak provides a replacement of the Shared Video Imaging System for mugshots. Now the images can be viewed by any location and be available via the Intranet and Internet.

Lane County’s new system will allow public access to photos of arraigned suspects and offenders, as well as provide a link to the Statewide Victim Notification System, making it possible for immediate notification to be sent to victims by a live operator before offenders are released. The Offendertrak system is also helping Lane County electronically convert, manage and update approximately 90,000 paper communications annually, including inmate reports, forms and assessments. This system is the first phase of a $10.5 million interagency information conversion and is part of the Area Information Records System (AIRS), an automated information system that serves a regional consortium of local public safety and justice agencies.

Senators Wyden (D-Ore.) and Kyl (R-Ariz.) introduced the Global Internet Freedom Act earlier this month, setting aside $60 million over two years “to develop and deploy technologies to defeat Internet jamming and censorship.” They’re talking about countries like China, as explained in this National Review article.

Under the USA Patriot Act, signed by President Bush a year ago, law enforcement received more power to conduct Internet surveillance and seek information from private companies. Privacy International and a growing number of affiliate human rights groups present the Big Brother Awards to government agencies, private companies and individuals who have excelled in the violation of our privacy.

Top Ten Signs your Neighbor is a Spy

    10. Begins every conversation by sayin, “Hey, you know any secrets?”
    9. Bumper sticker on car fender reads: “I’d rather be spyin'”
    8. After one too many drinks, asks “Want to see your FBI file?”
    7. Every Halloween, gives your kids plutonium
    6. He’s been driving around for the last 6 months with the body of Lenin in the trunk of his Buick
    5. You tell him you work for the government and the next thing you know you wake up nude in Switzerland
    4. You catch him going through your garbage in a raccoon suit
    3. You mention you’re having problems in the bedroom, and he says, “Yeah, I know”
    2. Your spot Yeltsin doing cannonballs in his pool
    1. He tries to plant a bug in your pants