Re: encryption algorithm (RFID)

[rossum]

On Wed, 1 Jul 2009 00:06:56 -0700 (PDT), Digger
<poly...@softhome.net> wrote:

>The RFID card store information in HEX format, encoded data stored in
>pages 0-2, 4-6, 8,9, 11.
>There are encoded small information about purchase details: probably
>date, time, and few other details. I want to find what is specific
>details encoded in every page, and what algorithm used to encode this
>info.
>Each RFID card have unique ID (UID), it's fixed and unchangeable.
>This UID probably used as a part of the key used to encrypt the data
>on pages.
>Is it possible to find and recreate encoding scheme(algorithm) used to
>encode details contained in RFID card?
>Below is an example of real information, stored in new RFID card
>( mifare Ultralight)
>(information stored in pages 2-3 is known, doesn't need decoding)
>
>SN0…SN6 04CDBBF9D12380
>PAGE0 04CDBBFA
>PAGE1 F9D12380
>PAGE2 8B48 7000
>PAGE3 20000000
>PAGE4 24202282
>PAGE5 945983DE
>PAGE6 809D89EE
>PAGE7 00000000
>PAGE8 00F82C00
>PAGE9 E0B32100
>PAGE10 00000000
>PAGE11 D8220100
>PAGE12 00000000
>PAGE13 00000000
>PAGE14 00000000
>PAGE15 00000000
>
>Card transaction printed receipt contains the following details:
>
>Purchase date: 25.06.2009 12:36:59
>System ID: 01TVD--PPT002--01
>Operator ID: 1
>Agent No: 999228
>Shift No: 51
>Transaction ID: 65
>Card No: 01-140891335015373
>
>I need find information stored in pages 0-1, 4-6, 8,9, 11 and what is
>specific encryption algorithm.
GIYF I get about 50,000 hits from "RFID card encryption". That
includes pieces on the cracking of at least one form of Mifare card.

rossum

[Digger]

No, this is not the case, there were discussed Crypto-1 encryption
algorithm used in mifare "classic" RFID chips.
This is another thing.

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