compressed

[mister_e]

Raymon's post translated... as best as I and Google translation can
<hr>
Hello

Thank you for your answer and more in French, it's great fun and I always have the same problem

This data come from an electronic card that connects to the PC and the card software encrypts the data in card's memory and when you do a reading of it you have that data.

The plain text will be often 40 bytes, plus the date and time, so a lot of bytes and saved and so on.

Or data are compressed to save a little room, or they are encrypted?

Plaintext example
9999888877776666 = 55554444333322221111

Will produce

F55100 805295 6501C9 2EFE73 356BD2 9C8CA2 E0E5FD AC9082 A2E6E3 F5C4EC
FADA9C 9985C8 EAE4CC 8E8F97 D4F6E6 C2868D 97DAFE 1C2462 65A5D8 0E0424
606779 341202 2C6661 A3EECA DA246A A1A3EC C61C20 BCA5B9 F6100C EEA4A3
B9341E CCE0A0 6775FE DCC0E2 666FB7 FCDEC0 2668AF BBFEDC 0228AC 6F7306
D80C2A 6C6B73 3824CE 226E69 385F

Thank you for your help

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My previous one

Raymond Ok I understand, but unfortunately I can't go further, I don't have this card, I don't have the software that goes with it, and it still seems a little vague and curious end-user application.

For the benefit of other users, the public language should be English here. Bellow is some French forum I know, maybe you'll be able to find help over there.
http://www.abcelectronique.com/forum/
http://forums.futura-sciences.com/

And now I come back to English for a brief explanation of our conversation with other forum members.