Talk:Near-field communication

message: Allo m8's  — Preceding unsigned comment added by 99.227.192.215 (talk) 01:24, 18 February 2016 (UTC)
replies: text: Many references are out of date. NFC has evolved so rapidly that even year-old references can be out of date. This article is written as a computer science advocacy paper instead of a reference. The opening paragraph needs to be understandable by all. Much information is given without citation. No History section is given so the article is a tangled web of information. I will attempt to make the opening paragraph more readable and up-to-date and add a History section to make it more understandable.— Milominderbinder2 talk 17:08, 14 June 2011 (UTC)
thread_title: Timeliness

message: This article does not address in very much detail the security risks of 13.56MHz and NFC - it does mentioned NFC has a serious eavesdropping risks. NFC is not permitted in any secure areas in the USA. Several cell phone manufactures have not been too enthused to adopt this as a standard because of this risk. IEEE 1902.1 is the only wireless technology that has approval for use in secure areas within the US and is in widespread use. It is true that a large percentage of the NFC signal is magnetic (about 40-50%) but what this article does not say is that at 13.56Mhz about 60-50% of the energy is an electric filed that has the ability to travel long distances. If you measure voltage on a loop antenna the E portion of the field drops off at 1/r, while the H (magnetic) drops of 1/r3. If you measure power the E field drops off 1/r2 and H drops off 1/r6. Bottom line is the E emissions provide a NFC security risk. The only way to eliminate eavesdropping risk is to eliminate E. NFC was concerned about bandwidth so decided to compromise security to get higher bandwidth. Have examples of conventional 13.56 Mhz RFID transmitter being detected 20 (twenty) miles from its source, even though the RFID tags only have a range of about 3 feet. Glad to discuss physics of this with any of the NFC group. Can assure you possible to monitor NFC signals at a distance and many papers confirm that. Most of the academic studies do tests with low cost equipment, but history has shown if money involved bad guys will develop expensive state of the art equipment and use. 
I will add a section to this that I think will be balanced and objective - many articles and concerns on this topic on web - great white paper on NFC from Phillips discusses above as well. 
Just because you operate in near field (usually means much below 1/10 wavelength) does not mean you don't emit far field detectable signals. 
(Jkmstevens (talk) 14:05, 22 January 2010 (UTC)
replies: text: Reverted to older version. Article was a copy of http://www.nfc-forum.org/aboutnfc/ 129.27.203.169 09:07, 4 May 2005 (UTC)
thread_title: Security Risks

message: I nuked the list of external links in the article because it's gone far, far beyond the point of being useful and into the deep end of spamcruft. Following the advice of WP:SPAMHOLE, let's start the section over. Here are the links I removed:
*http://www.nfc-forum.org/
*http://www.nfc-forum.eu
*ARYGON Technologies OEM NFC/Mifare readermodules
*TalkNFC.com Consumers Forum
*A press release from ECMA - on the acceptance of Ecma-340 as ISO/IEC 18092
*Innovision R&T on NFC
*NXP Semiconductors on NFC
*Sony on NFC
*Innovision NFC Forum Type 1 Tag Format
*Wired News article
*Nokia announces NFC enabled mobile phone covers (shells) for Nokia 3220
*Auracomm - Makers of NFMC chipsets 
*Overview of NFC technology and its operation
*smartNFC - Mobile Systems Management with NFC
*27 June 2006 - Nokia announces joint venture with Giesecke & Devrient to use NFC to develop contactless mobile payment applications.
*filrfid : le fil rouge de la RFID - A french speaking portal dedicated to RFID and NFC applications
Let's pick a few very good and solid links that pass Wikipedia:External links out of this list to put back in the article. The company links can be left out, since Wikipedia is not a links directory or vehicle for promotion. — Saxifrage ✎ 22:23, 14 October 2006 (UTC)
thread_title: External links

message: Edward 14:49, 15 January 2007 (UTC)
thread_title: Request photograph

message: I've updated the list of NFC trials. The list is not complete as new trials are announced every week however I've tried to put a list as much accurate as possible.
Curiouscitizen 10:37, 14 August 2007 (UTC)
thread_title:  List of trials 

message: New update of the list. I have removed the projects of SEP (Bulgaria) and m-pay (Poland) because they are Mobile payment project based on SMS, not NFC.
Curiouscitizen (talk) 16:23, 7 December 2007 (UTC)
replies: text: I would remove all the trials which does not have a reference. What do you think? Some of them are just a list of companies. --Ivanmilara (talk) 15:31, 16 January 2009 (UTC)
thread_title:  List of trials 

message: I have renamed the References section to be (foot)Notes and introduced a "proper" References section to hold the list of reference works (books, articles, etc.)
to be used to support citations. I have also included a reference to an article to support the claim of distance "up to 10cms".--Михал Орела (talk) 09:22, 24 October 2008 (UTC)
thread_title:  Notes and references

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thread_title: File:NFC-N-Mark-Logo.png Nominated for speedy Deletion

message: At present, this article is a bit of a mess. It seems to have a "kitchen sink" approach, filling every section with all manner of external links, uncited quotations, non-sequitur factoids, and "wouldn't it be cool if?" sentences, with no coherent structure or explanatory aim. (Indeed, when I first read it I couldn't even get an idea of what NFC is, just what it could be used for.) I've tried to remedy this at the beginning (in the lead and in the "Uses" section), where I think clarity is most important. A similar approach is needed in much of the rest of the article, if anyone else is up for it... -- Perey (talk) 07:52, 11 December 2011 (UTC)
replies: text: I'm hoping to pick up the torch where it got left off. I think the whole article could benefit from some restructuring, including moving the "History" section in front of "Uses" (now that the tech has been around long enough that there is a significant history), as well as unifying the "Standards" and "Standardization bodies and industry projects" sections. Additionally, is the "Comparison with Bluetooth" section really relevant to the rest of the article? Can it be removed, or perhaps combined with another section? Finally, in regards to the complaint that the article reads like an advertisement, I would appreciate any feedback as to where to draw the line between when citing specific companies' implementations of the technology crosses over from factual reporting to promotion. The "Uses", "History", and "NFC-enabled handsets" sections in particular seem to list certain products without particular reason. --FacultiesIntact (talk) 05:37, 14 November 2014 (UTC)
thread_title:  Tidy up 

message: A cell phone representative said grocery stores in the USA will soon be equipped with this technology so you just swipe your cell phone and some toll roads are already equipped with the technology. 108.81.134.236 (talk) 03:26, 23 February 2012 (UTC)
thread_title:  Application

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thread_title:  External links modified 

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thread_title:  External links modified 

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thread_title:  External links modified (February 2018) 

message: In the opening sentence of this article, the range of NFC is given as "4 cm (1.6 in)".
In the first sentence of the Design section, the range is given as "10 cm or less".
In two places in the Bluetooth comparison section, the range is given as "<20 cm".
We need to either make these numbers consistent or explain in the article why they aren't.
There's a note saying "Theoretical working distance with compact standard antennas: up to 20 cm (practical working distance of about 10 cm)", but it's down in the 4th paragraph of "Design" and marked as "citation needed."
-- Gary D Robson 23:28, 26 December 2018 (UTC)
thread_title:  Range inconsistencies in this article 

message: PCMCIA is an obsolete computer acronym.  Unlimited jumbles of letters get to be too much - 50.80.242.31 (talk) 16:42, 21 November 2019 (UTC)
thread_title:  People Can't Memorize Computer Industry Acronyms 

message: Assuming that the antennas for an NFC link are planar spirals, holding the portable device parallel to the fixed device antenna should provide optimum coupling.
During a phone call with a well–informed person, I confirmed that tapping has no purpose, technically. After some thought (but before the call, perhaps), I concluded that asking users to tap is a really–concise way of ensuring close proximity. 2600:4040:5009:4A00:1096:8107:CAF9:710F (talk) 14:25, 11 June 2022 (UTC)
thread_title:  Tapping a card onto a fixed device that uses NFC 

message: After reading at least technical sections, I found no mention of such communication by  modulating energy absorption by the passive device. Perhaps this is not done in strictly–defined NFC devices? Energy permitting, I'll study the RFID article. (Sorry, age 86, fairly severe depression...) 2600:4040:5009:4A00:1096:8107:CAF9:710F (talk) 14:36, 11 June 2022 (UTC)
thread_title:  Communication from a passive device to the active device