RFID used to be treated as a self-contained piece of hardware: a card, a reader, a door. That view is now out of date. Modern access control and tracking systems connect to building networks, identity directories, HR platforms, and cloud dashboards — which means an RFID deployment is part of an organisation’s IT attack surface, not separate from it.
Securing it requires looking at both the physical layer and the digital one.
The physical layer: cards and readers
Card cloning
The most widely discussed RFID risk is still the cloned credential, and it is largely a question of which card technology is in use.
- 125 kHz proximity cards typically transmit a fixed identifier with no encryption. Low-cost copying tools can read and duplicate them.
- MIFARE Classic cards use an encryption scheme that was publicly broken years ago, so they should not be relied on where security matters.
- MIFARE DESFire cards use AES-based mutual authentication, which makes cloning dramatically harder. For new deployments, current generations such as DESFire EV3 are the better choice.
For sites where access control genuinely matters, migrating from legacy proximity or MIFARE Classic cards to a modern secure credential is one of the highest-value security improvements available. POXO supplies both 125 kHz and 13.56 MHz smart cards, including DESFire EV1 and EV3, so a site can move at its own pace.
Reader tampering
A reader mounted on the unsecured side of a door is exposed. Risks include opening the housing, intercepting wiring between reader and controller, and replacing the reader with a malicious one. Mitigations include tamper switches that raise an alarm, placing controllers on the secure side, and using encrypted reader-to-controller protocols rather than older unencrypted wiring standards.
Tailgating
No credential technology stops someone following an authorised person through a door. Physical measures such as turnstiles and flap barriers, anti-passback rules, and camera verification address this gap.
The digital layer: networks, APIs, and data
Networked controllers and readers
Access controllers and fixed readers are network devices. Default passwords, unpatched firmware, and flat networks where readers share a segment with office laptops all create openings. Readers and controllers should sit on a segregated network, with default credentials changed and firmware kept current.
Integrations and APIs
The integration between RFID software and HR, ERP, or visitor systems is often the weakest link. APIs should use authentication, transport encryption, and the minimum permissions they need. A compromised integration can be used to add credentials or delete logs without touching a single card.
Cloud and data storage
Access and movement logs are personal data: they show where named people were and when. Under India’s Digital Personal Data Protection Act, 2023, organisations need a lawful basis for processing that data, reasonable security safeguards, and defined retention. Storage should be encrypted, access to logs restricted by role, and retention limited to what is actually needed.
Some organisations choose to keep this data entirely on-premise. For ONGC Vadodara’s IT asset management system, POXO deployed the application on ONGC’s own server with no external cloud dependency.
Why AI raises the stakes
AI tools lower the effort needed to probe systems, write convincing phishing messages that target facility staff, and analyse stolen logs for patterns. They do not change the fundamentals of RFID security, but they reduce the time between a weakness being exposed and it being exploited. That makes basics such as patching, credential rotation, and monitoring more urgent, not less.
A layered checklist
- Credentials — retire cloneable card types where security matters; revoke lost cards immediately.
- Readers — tamper detection, secure mounting, encrypted reader-to-controller communication.
- Network — segregate access devices; change defaults; patch firmware.
- Software — role-based access, multi-factor authentication for administrators, secured APIs.
- Data — encryption, access restrictions, and retention aligned with the DPDP Act.
- Monitoring — alerts for forced doors, repeated denials, off-hours activity, and configuration changes.
- Incident response — know who to call. In India, CERT-In’s directions require specified cyber incidents to be reported within six hours of being noticed.
Security is a process
No single product makes an access system secure. It comes from the right credential technology, sensible installation, a protected network, and someone reviewing the logs. When planning an access control system, treat it as part of your security programme rather than as a facilities purchase.
Talk to our team about assessing or upgrading your access control credentials.
Frequently Asked Questions
Can RFID access cards be cloned?
Some can. Many 125 kHz proximity cards transmit a fixed ID without encryption and can be copied with inexpensive tools, and MIFARE Classic’s encryption has been publicly broken. MIFARE DESFire cards use AES-based authentication, which makes cloning far more difficult, and current generations such as EV3 are recommended for new deployments.
What is the most important RFID security upgrade?
For most sites, replacing legacy 125 kHz or MIFARE Classic credentials with a secure card technology gives the largest improvement. After that, segregating access devices on their own network and securing software integrations close the most common digital gaps.
Are RFID access logs covered by India’s data protection law?
Access and movement logs link named individuals to places and times, so they are generally personal data under the Digital Personal Data Protection Act, 2023. Organisations should apply reasonable security safeguards, restrict access, and define how long the logs are retained.
Should RFID system data be stored in the cloud or on-premise?
Either can be secure if configured properly. Cloud hosting simplifies remote access and maintenance, while on-premise hosting keeps data inside the organisation’s own environment, which some government and critical-infrastructure sites require. The choice should follow the organisation’s security policy.