Track 1 characters are 6īits plus one (odd) parity bit. The parity checking is pretty impressive. >error checking (parity) since the card can just be run thru again if >The code must be self-clocking and I would guess just have simple (It was originally intended for off-line ATM authorization, ManyĬards issued today do not even have magnetic media at the location for Track 3 is a read/write track that has the same electromagnetic propertiesĪs track 1, but its usage is not standardized within the industry. Your bank card will typically only use the read-only tracks one and two. >a total of 4 tracks on my bank card, but only two on my student id, which >I discovered that cards seem to use two different levels of stripe, for You could use a scope to determine which is which - track 2 is recordedĪt 75 bits/inch while track 1 is 210 bits/inch. One of our vendor's configurations for the wiring looked like this: In most all of the MSR's I've taken apart, the chips are custom. Know about mag stripe encoding for financial services cards. It details everything (everything!) you ever could possibly want to Just happen to have sitting in my lap.) It is available from theĪmerican National Standards Institute, Inc. You'll want to see the American National Standard X4.16 (which I Quote: "We don't care about freedom of the mind, | Postbus 22953 (in DUTCH)įreedom of signature will do just fine" | 1100 DL AMSTERDAMĪny opinions in this posting are wasted on you | tel: +31 20 6001480įrom ucsd!swrinde!!julius.cs.!psuvax1!rutgers!dayton!jad Fri Sep 28 04:18: Rop Gonggrijp ( ) is also editor of Hack-Tic (hack/phreak mag.) The full specs on all this in the last issue. Not much to it, I did it on a Commodore-64. Well, the bad news is that you'll have to write the decoding software yourself. >The chips don't seem to be identifiable. >of 2 head tracks and a 5th that goes low when a card is being run thru. >I just bought a card reader which had 5 ttl level outputs. Within the space for 1 bit, it all works. Since you cannot double of half the speed of the card par.) totalĭata is coded reversing the polarity of the magnetic field once or twice in The third track has agian 210 BPI, 5 bits per chr (yeah incl. The second track has 75 BPI, 5 bits per chr. The top one isĢ10 BPI and has 7 bits per chr. Well, there's three tracks (ISO 3554), all 0.110" wide. >to the library and looking thru the reader 's guide didn't get me anywhere. >credit cards, bank cards, my student id, etc.? Any references? A trip >Does anybody know how information is encoded on the magnetic stripe for Path: ucsd!usc!cs.!uunet!mcsun!hp4nl!!ropg Organization: The Avant-Garde of the Now, Ltd. Subject: Re: Encoding Scheme of Mag Stripe Cards? Decoding magnetic cards Path: !uwm.edu!wupost!!!ames!agate!dog.ee.lbl.gov!!!brian
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