I have seen some misunderstanding about ARQC, so what is it ?
What is ARQC?
So, in simple terms the ARQC is a cryptographic value that is generated during an EMV transaction.
It is generated by the card's chip when it asks for authorization of the transaction.
It is like an electronic signature that confirms the transaction is valid and that the card present is genuine.
But how does it work?
When you insert your EMV card into an ATM or a POS etc.
1. The chip on your card uses its unique secret key (THE ARQC CODE) and data specific to the transaction
2. This ARQC is sent to the bank or card issuer for approval.
3.The bank decrypts the ARQC using a matching key and checks if it’s valid. If it is, the transaction is approved. If not, it’s declined.
BUT CAN WE BYPASS IT AND ACTUALLY CASH OUT MONEY?
So ARQC remains one of the strongest defenses against fraudulent transactions but no system is 100% secure.
Here are a few potential weaknesses:
1. Skimming and Data Breaches (depends on your dump vendors)
So if a scammer can obtain the details of an encrypted card such as through skimming devices or a breach they can read the transaction information.
2. Advanced New Softwares.
Advanced software can generate an ARQC that matches the cryptographic pattern required for the transaction.
But as i said they are not public and someone that doesn't know coding can't have access to it.
Alright, so overall, the ARQC material has some pretty solid cryptographic security, but it's not completely invulnerable to clever methods. It's conceivable that clever software could bypass ARQC.
What is ARQC?
So, in simple terms the ARQC is a cryptographic value that is generated during an EMV transaction.
It is generated by the card's chip when it asks for authorization of the transaction.
It is like an electronic signature that confirms the transaction is valid and that the card present is genuine.
But how does it work?
When you insert your EMV card into an ATM or a POS etc.
1. The chip on your card uses its unique secret key (THE ARQC CODE) and data specific to the transaction
2. This ARQC is sent to the bank or card issuer for approval.
3.The bank decrypts the ARQC using a matching key and checks if it’s valid. If it is, the transaction is approved. If not, it’s declined.
BUT CAN WE BYPASS IT AND ACTUALLY CASH OUT MONEY?
So ARQC remains one of the strongest defenses against fraudulent transactions but no system is 100% secure.
Here are a few potential weaknesses:
1. Skimming and Data Breaches (depends on your dump vendors)
So if a scammer can obtain the details of an encrypted card such as through skimming devices or a breach they can read the transaction information.
2. Advanced New Softwares.
Advanced software can generate an ARQC that matches the cryptographic pattern required for the transaction.
But as i said they are not public and someone that doesn't know coding can't have access to it.
Alright, so overall, the ARQC material has some pretty solid cryptographic security, but it's not completely invulnerable to clever methods. It's conceivable that clever software could bypass ARQC.
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