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Questions tagged [dukpt]

16 questions
4
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1 answer

MAC variant of MSR DUKPT?

Currently I am working on a ChipCard EMV device decryption. Down below is the related data I have after using the transaction (TLV format as Tag Length Value): --- It means KSN 0A 950003000005282005B4 ---- per instruction, it is…
Curly
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2 answers

Decrypt a data by 3DES-128 bits CBC Mode (padding zero)) using java

In the process of decrypting an encrypted data, i am having a little challenge with it. I will be so glad if anyone can help putting me through. Although, i have already studied the algorithm in carrying out this operation, since i am to get my data…
user6849758
2
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1 answer

Decrypt 3DES DUKPT per the ANSI X9.24 part 1 standard

I have a Magtek uDynamo and am trying to decrypt track 1. I have read the below and understand a little bit but don't know how to actually decrypt the data. The vendor said to use the ANSI test key to decrypt but I can't find anything on that. I…
user1054513
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Triple-DES DUKPT CBC PIN variant vs Data variant

Does any know the difference between triple des dukpt decryption algorithm with PIN variant and Data variant? I have done Triple DESK DUKPT PIN variant, which generate session key from KSN and BDK. And then decrypt message using the session key.…
Curly
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1 answer

Why is DUKPT encryption preferred over RSA for encrypting card data on POS terminals?

I'm currently working on a project involving encryption of card data on POS terminals, and I've come across two popular encryption algorithms: DUKPT (Derived Unique Key Per Transaction) and RSA (Rivest-Shamir-Adleman). I'm wondering why DUKPT is…
BigFire
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Encrypting payment track details using DUKPT key management in objective C

I finding hard to get the solution to encrypt the payment track details which I got from InfinieaTab device. I am using DUKPT key management with 3DES algorithm. It would be grateful if I find any code snippet on this.
Bharath S.J
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Decrypting Magtek EMV Data

basically my question is more of a "how should I approach this" than more of a code example based question....Basically I am trying to decrypt the Tag DFDF59(encrypted data tag) from a Magtek eDynamo EMV dip which has data like encrypted track 2…
javip
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Difference between PIN encryption key variant and data encryption key variant

In the process of decryption a data, I am getting this two definitions confused. I would really appreciate a better understanding to these two different description. Already searched google, to see if i can get more understanding, but still confused…
user6849758
1
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0 answers

Difference between 3DES-DUKPT CBC and 3DES-DUKPT CBC-MAC

Does anyone knows the difference? I am decrypting a chipcard code for one of our vendors EMV machine. The algorithm is called to be 3DES0DUKPT CBC-MAC? I have successfully done 3DES-DUKPT CBC before.... How is CBC-MAC different from CBC during the…
Curly
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1 answer

3DES-DUKPT (CBC) decryption confirmation

I have Key Serial Number (KSN), Base Derivation Key (BDK), and encrypted string. KSN = 9500030000044520002B BDK = 0123456789ABCDEFFEDCBA9876543210 Encrypted…
Curly
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Dukpt AES-192 and AES-256 derive key calculation

In many places and for different programming languages we can find how to calculate derivation key for IK length 32 which will work for AES-128, but AES-192 and AES-256 use keys bigger size, for example: AES-128 key: 6AC292FAA1315B4D…
Serge Janssen
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python script for to decode track data encrypted with DataKey

I am having troubling with generating IPEK from BDK and KSN from python, after that i want to generate dataKey from kSN and IPEK. Is there any way to do this two functions using python? Wanted Scenario below def decryptinfo(ksn, data): BDK =…
s.am.i
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Where do i get BDK for DUKPT decryption

I have generated a BDK Type3 key for DUKPT in Thales HSM. I have sent this BDK which is encrypted under the LMK of the HSM to the terminal manufacturer to generate the IPEK key and inject it into the terminal. When I receive the encrypted data I…
psh
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How to decode DUKPT CBC mode in Java?

I can't decode the DUKPT swipe Data, I'm trying using differers examples but the credit card information is encoded yet.
JOSE JOAQUIN GAMBOA
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Java implementation of 3DES and DUKPT for decryption of credit card reader data through keyboard emulation?

We have an online key-in interface, and are support credit card swipe capability. In the industry today, the card reader should encrypt the information before encoding it to ASCII, and then it is up to server-side to decrypt. (so the local machine…
700 Software
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