Read/Write

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   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.

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amal Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Admin Group Joined: 22 November 2005 Location: United States Status: Offline Points: 2061	Post Options Post Reply Quote amal Report Post Thanks(0) Quote Reply 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 ;) www.amal.net

JordanRinke Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 January 2011 Status: Offline Points: 3	Post Options Post Reply Quote JordanRinke Report Post Thanks(0) Quote Reply 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?

JordanRinke Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 January 2011 Status: Offline Points: 3	Post Options Post Reply Quote JordanRinke Report Post Thanks(0) Quote Reply 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.

amal Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Admin Group Joined: 22 November 2005 Location: United States Status: Offline Points: 2061	Post Options Post Reply Quote amal Report Post Thanks(0) Quote Reply 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 ;) www.amal.net

JordanRinke Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 January 2011 Status: Offline Points: 3	Post Options Post Reply Quote JordanRinke Report Post Thanks(0) Quote Reply 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)