Carding in the PQC (Post-Quantum Cryptography) Era: What Will Change?

[Good Carder]

From carder to carders. They say quantum computers will destroy modern cryptography, and along with it, carding. But let's face it: data theft, social engineering, database leaks — all of these are here to stay. Technology changes, but human nature does not.

In 2026, PQC is no longer a theory, but an engineering reality. TLS certificates are transitioning to hybrid schemes, and regulators are demanding crypto-flexibility from financial institutions. In this article, I'll examine what will change for carders, which loopholes will be closed and which will open, and how to avoid being duped when quantum computers finally turn on.

Part 1: Why PQC Isn't the Apocalypse, Just a New Stage in the Race​

Quantum computers powerful enough to break modern cryptography (RSA, ECC) are expected to appear between 2027 and 2035 (Q-Day). This isn't tomorrow, but it's not the day after either. In the financial sector, however, the transition to post-quantum cryptography (PQC) is expected to be complete by 2030–2035.

But:

• Card theft (carding) is not encryption hacking. Carders don't decrypt TLS sessions on the fly — they exploit human error, website vulnerabilities, and payment forms. PQC won't stop phishing, session cookie theft, or social engineering.
• 3D Secure, AVS, and scoring models will remain. A quantum computer won't help you bypass 3D Secure or fake biometrics.

But if you're hoping a quantum computer will crack your card's encryption and you'll get your CVV out of thin air, no, that's not how it works.

Part 2. What is PQC and why are processors already obsessing over it?​

PQC (Post-Quantum Cryptography) is a family of algorithms resistant to attacks by quantum computers. In August 2024, NIST approved three standards:

• FIPS 203 (ML-KEM) - for key exchange (RSA/ECDH replacement).
• FIPS 204 (ML-DSA) – for digital signatures (replacement of ECDSA/RSA-PSS).
• FIPS 205 (SLH-DSA) - for long-term signatures.

But the financial sector isn't waiting for Q-Day. Standards like DORA (EU) already require "crypto-agility" — the ability to change encryption algorithms without disrupting business processes. And NIST, CISA, and the G7 strongly recommend switching to PQC, because the threat of "build now, decrypt later" is already real.

Why is this important to us?​

From a carder's perspective, PQC doesn't eliminate carding, but it does complicate one of the old schemes — intercepting traffic between the victim and the bank via a MITM attack. However, for mass carding, this is almost irrelevant. What's more important to us is that PQC is the first step toward a more secure infrastructure that could potentially reduce the effectiveness of BIN attacks and some types of brute-force attacks (although such attacks are not currently implemented in practice).

Part 3. Threat #1 for Long-Term Carders: Harvest Now, Decrypt Later​

The most dangerous threat for those who store their logs for years is the "Harvest Now, Decrypt Later" attack. Data encrypted with RSA/ECC in 2024–2026 (your logs, session cookies, instant messaging messages, encrypted disk files) can be collected now and decrypted when a quantum computer powerful enough to handle it becomes available.

For a carder, this means:

• If you store encrypted logs and configuration files, consider them potentially compromised. A quantum computer will decrypt everything you've been "preserving" for years.
• By switching to PQC, the financial infrastructure will become resilient to this threat. However, old logs encrypted before the transition will still be decryptable.

Your strategy:

• Don't store sensitive data longer than necessary.
• Use post-quantum-safe encryption methods for long-term storage (hybrid schemes, such as a combination of classical and PQC algorithms).
• Destroy old logs permanently (wipe or physically destroy the media).

Part 4: What will change in payment gateways and authorization?​

4.1. TLS and HTTPS will become more secure, but not for carders.​

With the implementation of PQC in TLS, financial transactions in transit (between the victim's browser and the bank) will become significantly more secure from passive interception. Today's public keys and certificates are exchanged using algorithms that can be cracked by a quantum computer. PQC will make this exchange resistant to quantum attacks.

However, the problem is that your attack almost never involves directly decrypting a TLS session in real time. You're using social engineering to trick the victim into entering data on your phishing site. TLS protects the channel, not the person. PQC won't prevent you from tricking the victim or stealing their session cookie after they've logged in.

4.2. Payment infrastructure (Stripe, Adyen, Braintree)​

Payment gateways themselves will be forced to migrate to PQC. This will impact transaction speed (PQC certificates are 5-20 times larger than traditional ones) and compatibility (older devices may not support PQC). This could introduce new lags and errors in payment processing, which could be exploited under certain conditions.

However, for mass carding (payment processing), this will be largely irrelevant. Payment gateways will become more resilient to cryptographic attacks, but not to BIN attacks, card theft, or business logic fraud.

4.3. Crypto wallets​

Crypto companies are already implementing quantum-safe wallets using PQC algorithms to protect private keys. This means that in 5-10 years, stealing crypto by cracking a private key on a quantum computer will become impossible. But this also means that if you don't transfer your old coins to PQC wallets, they could be stolen post-quantum in the distant future.

Part 5. Authentication of the Future: Not PQC Alone​

In parallel with PQC, other protection methods are also being developed that could seriously complicate the lives of carders.

5.1. Passkeys and biometrics​

Apple Pay and Google Pay use tokenization and hardware encryption (Secure Enclave for Apple, TrustZone for Android). A one-time cryptogram is used instead of a card number, and the transaction itself requires biometric authentication (Face ID, Touch ID). Even if you steal the card number, you won't be able to complete the transaction without the victim's physical device.

For carders, this means that cards linked to mobile wallets are becoming an increasingly less attractive target. Traditional cards (magnetic stripe, CVV) will gradually be phased out, but this process will take years.

5.2. Tokenization, 3DS 2.x, and Continuous Verification​

• Tokenization already replaces actual card numbers with one-time transaction tokens. PQC will strengthen the security of these tokens.
• 3DS 2.0 and higher require biometric authentication or confirmation in the bank's app, making chargebacks and card hit without the victim's physical device increasingly difficult.

Quantum computers will not help to bypass these defenses, since they do not attack the cryptography on which they are based, but manipulate the victim's behavior.

Part 6. AI and Machine Learning: Quantum Fraud Detection​

The paradox is that PQC is not only a threat but also a defensive weapon. Quantum machine learning (QML) algorithms are capable of detecting anomalies beyond the capabilities of classic AI. For example, QML can detect ultra-fast "swarm" attacks, when thousands of cards are tested simultaneously in different regions, at a speed inconceivable to the human eye.

For carders, this is a wake-up call: anti-fraud systems will become smarter and faster. However, in practice, most banks and payment gateways still use classic ML models (XGBoost, random forest, neural networks), which are already excellent at detecting mass card tests and atypical behavior.

Part 7. PQC vs. Carding: What Will Really Change?​

Let's break this down into pieces.

Aspect	What will change with PQC?	What will remain the same
Card theft (BIN attacks)	It won't change directly. PQC doesn't affect card number validation.	Phishing, database theft, skimming, POS-terminal hacking
Session hijacking (cookie stealing)	It won't change. PQC protects the channel during transmission, but not the data itself after authentication.	Injecting malicious code into a website, exploiting XSS, and social engineering
3DS, chargebacks	It won't change. PQC doesn't make the 3DS more playable. On the contrary, biometrics and hardware tokens make it stronger.	Social engineering to obtain 2FA codes, bypassing through a processing vulnerability
Encryption of logs and compromising information	The "Harvest Now, Decrypt Later" threat will emerge. Your old encrypted data could be decrypted by a quantum computer in 10 years. Switch to PQC encryption.	A strong password + encryption (AES-256) still works unless you store data for decades.
Antifraud	Enhanced by QML. Anomalies will be detected faster and more accurately.

Part 8. A Practical Checklist for a Carder​

• Don't expect a quantum computer to hack your payment gateway. That's not how it works.
• Encrypt old logs and configs using a hybrid method (classic + PQC) or physically destroy them.
• Keep an eye on the implementation of PQC in TLS. This won't change much for you, but it will help you understand when traffic interception becomes technically more difficult.
• Focus on social engineering, phishing, and database leaks. PQC won't stop anything that isn't based on breaking mathematical algorithms.
• Use PQC to your advantage. For example, encrypt your communications using post-quantum-safe methods (Signal already uses a combination of classical and PQC algorithms).
• Transfer your crypto to PQC wallets if you plan to hold it for years.
• Don't store sensitive data longer than necessary. Be aware of the HNDL threat.

Summary​

Carding won't die with the advent of PQC. Card theft, database leaks, social engineering, phishing, 3DS bypass by accessing a victim's account — all of these will remain with us for years to come. PQC closes one door (passive cryptanalysis), but leaves all the others open. Moreover, PQC is not an instantaneous event, but a long, painful, and uneven transition. The payments market will exist in a hybrid mode (classical and post-quantum cryptography) until at least 2035.

A quick one-line reminder:
"Don't wait for Q-Day; it won't make carding dead. Card theft will continue, phishing will thrive, and database leaks will still happen. PQC won't break your cards; it will strengthen payment gateways, but you'll still be able to hack a site with an XSS vulnerability." Use PQC for your protection, don't keep logs for years, and remember: a quantum computer won't help you hit CVV."