From owner-freebsd-current@FreeBSD.ORG Sun Mar 6 15:01:45 2011 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id C3B33106564A for ; Sun, 6 Mar 2011 15:01:45 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-vx0-f182.google.com (mail-vx0-f182.google.com [209.85.220.182]) by mx1.freebsd.org (Postfix) with ESMTP id 6F0388FC15 for ; Sun, 6 Mar 2011 15:01:45 +0000 (UTC) Received: by vxc34 with SMTP id 34so3693004vxc.13 for ; Sun, 06 Mar 2011 07:01:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=iQbq0aHOp4aCzvcLwS49pzxXIJgbWh2tFdwDTP2Oj/k=; b=l6U5uqGn7zLD2hh/mvjo5zQjPMPkO2KkGQzub3XiG86w+kfn2Fgp8ny2ZufSu8PNiw p/gj0WEPCOdPXUk9qh7kNquHMnLH74s81+OA5RiHA9BesbQ8PhSymjlb3542PSpAK/8n p5+vzjJGptGskSXGGLk6QoBz2Btna3CB4XJAQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; b=wSnUJWUYQ9jwuHMiRcA7yObtfpXLKdm30t8YheDVqCMAiSN/8/p4wUGpVcrN4HExK8 d6L8k4bbo21oHA+P7QJvwIaXA3S7Q0lurEssLbMU+mebZGNxMoN5TFo+etuFTWj8D03l Ot/nIh5+zqk9GSzrGOZDQhA/CkDNDaqmRng4A= MIME-Version: 1.0 Received: by 10.52.69.140 with SMTP id e12mr1540024vdu.187.1299423704551; Sun, 06 Mar 2011 07:01:44 -0800 (PST) Sender: adrian.chadd@gmail.com Received: by 10.52.167.3 with HTTP; Sun, 6 Mar 2011 07:01:44 -0800 (PST) In-Reply-To: <4D73A085.4030009@gthcfoundation.org> References: <4D7398C6.8030800@gthcfoundation.org> <201103061533.32138.hselasky@c2i.net> <4D73A085.4030009@gthcfoundation.org> Date: Sun, 6 Mar 2011 23:01:44 +0800 X-Google-Sender-Auth: -xXkGOyahA2VEMYQ7s9-0YjKybo Message-ID: From: Adrian Chadd To: erob@gthcfoundation.org Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-current@freebsd.org, Hans Petter Selasky Subject: Re: can somebody explains OFDM in FreeBSD? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Mar 2011 15:01:45 -0000 OpenBSD has driver support for OFDM chips. Anything that speaks 11a, 11g or 11n == OFDM. You'd have to speak to an RF related person about your definition of harmful. I mean, think about it - 802.11 devices are supposed to give off EMR that a receiver can decode. So your question about whether OFDM being harmful requires more context, as unlike wired solutions (say wired ethernet) which may give off EMR which could then be snooped, 802.11 is supposed to be received through EMF. :) Also, that paper you referenced talks about ERLANG, it doesn't mention OFDM anywhere. HTH, Adrian On 6 March 2011 22:56, Etienne Robillard wrote: > On 06/03/11 09:33 AM, Hans Petter Selasky wrote: > > On Sunday 06 March 2011 15:23:02 Etienne Robillard wrote: > > > >> Hi, as the subject line implies, can someone explains why OFDM > (Orthogonal > >> Frequency Division Multiplexing) is required for running run(4) ? Is > there > >> any (safer) alternative to OFDM? > >> > >> If not, could the FreeBSD security team verify the the safety of OFDM > >> derived > >> drivers (in particular wireless ethernet based nics) so that no ones get > >> hurt being > >> a WLAN (802.11ng ethernet-class) subcarrier ? > >> > > As per my knowledge OFDM is a carrier format which is handled by the > hardware. > > Is there anything in particular you want to high-light? > > > > --HPS > > > > > Yes, from a security perspective, could radiance from ELF/VLF operating > devices as > "ethernet-class subcarriers" which is part of the OFDM spec be > considered harmful? > > if not is there any OFDM code in OpenBSD? > > Cheers, > > > references: > > 1. Orthogonal Frequency Division Multiplexing (OFDM) > https://gthc.org/investigations/pub/armstrong.pdf > > > > -- > > Etienne Robillard > > Company: Green Tea Hackers Club > Occupation: Software Developer (and CEO) > E-mail: erob@gthcfoundation.org > Work phone: 450-936-2123 > Website (Company): https://gthc.org/ > Website (Blog): https://gthc.org/blog/ > PGP public key fingerprint: F2A9 32EA 8E7C 460F 1728 A1A7 649C 7F17 > A086 DDEC > > During times of universal deceit, telling the truth becomes a revolutionary > act. -- George Orwell > > If a free society cannot help the many who are poor, it cannot save the few > who are rich. -- John F. Kennedy > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >