Content deleted Content added
Citation bot (talk | contribs) Removed parameters. | Use this bot. Report bugs. | Suggested by Spinixster | Category:Payment systems | #UCB_Category 126/213 |
mention yet another related technology, with reference. |
||
Line 16:
*'''Angle modulation of ferromagnetic particles:''' A code is embedded into the magnetic stripe using read and write heads operating diagonally to the direction of swipe in the reader. With appropriate signal processing, these can read and encode a small amount of additional data which is polarised in a different axis to the ISO standard tracks.
*'''Infrared barcodes:''' The second class concerns encoding the code onto the plastic base of the card using special inks (probably a bar code), or reading a code which is inherently embedded as part of the plastic manufacturing process for each batch. Such a code may only be visible under infrared illumination (or other invisible wavelength).
* [[ Wiegand effect #Wiegand keycards | Wiegand keycards]], like capacitive MM codes, embed a code into the middle layer of the card, and so are more durable and difficult to counterfeit than printed barcodes or magnetic stripes on the surface of the card.<ref>
[https://www.google.com/books/edition/Security_Supervision_and_Management/Ehc1omWy6iMC "Security Supervision and Management: The Theory and Practice of Asset Protection"].
2007.
p. 365.
</ref>
==References==
| |||