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Read/Write

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amal View Drop Down
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Joined: 22 November 2005
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Post Options Post Options   Thanks (0) Thanks(0)   Quote amal Quote  Post ReplyReply Direct Link To This Post Topic: Read/Write
    Posted: 04 January 2011 at 5:10pm
I can't really give you any pointers at the moment with regard to full featured readers for the HITAG S... things change so fast and I have no idea what you applicaiton is.
 
I can tell you I didn't put both in the same hand because they would interfere with each other. Neither tag supports anti-collision, and if put into close proximity to each other, neither tag would be able to communicate with any readers.
Amal ;)

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Post Options Post Options   Thanks (0) Thanks(0)   Quote JordanRinke Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2011 at 11:18am
One quick addition that is off topic: I see that you got both styles, any reason you didn't put both in the same hand?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JordanRinke Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2011 at 11:14am
Thanks for the super quick response, any chance you can suggest a supplier/link for the chip/reader/writer so I can get an idea of what I am looking to purchase? There is so much out there I don't want to accidentally head down the wrong path initially.
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amal View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote amal Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2011 at 10:57am
Welcome to the forum :)

A HITAG can be written to, but not in a way that an EM4102 reader will be able to read it. You can use a HITAG capable reader to fully take advantage of the HITAG's features, and you can get a HITAG S chip that employs 40bit challenge-response security. While 40 bits doesn't seem like that much, it should be enough to ward off momentary attacks from casual hacker types.

The trick will be ensuring you get a reader that fully supports the HITAG S and all its crypto-security features.
Amal ;)

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Post Options Post Options   Thanks (0) Thanks(0)   Quote JordanRinke Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2011 at 10:32am
What read/write chips are available for implant? (I searched the forum with no luck) All of the EM4102 appears to be Read only, Can a HITAG S running in compatability mode at 125Khz be written to? Sorry I am fairly new in this space trying to find my way. I want to implant a chip that has at least 16bits of read/write memory so I can implement one time ID codes that are written every morning to add some security but still have the benefits of the price point of common 125Khz readers. Thoughts/Suggestions? Possible? Anything would be greatly appreciated.

(I just ordered the book so if there is anything in there that covers this feel free to just give me page numbers to read)
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