// THREAT DETECTION AND DATA PRIVACY TERM
Replay Attack
A replay attack is when an attacker secretly intercepts and saves a valid message, like a login attempt, and then sends it again later to impersonate the original user. This can trick the system into granting unauthorized access or repeating a transaction.
TECHNICAL DEFINITION
A replay attack is a network-based security exploit where an adversary intercepts a valid data transmission (e.g., authentication credentials, session tokens, financial transactions) and maliciously or fraudulently repeats it to impersonate a legitimate user, thereby gaining unauthorized access or duplicating an operation. This attack vector exploits protocols lacking mechanisms like timestamps, nonces, or cryptographic sequencing to validate the freshness of the communication.
BACKGROUND
This is a list of cybersecurity information technologies. Cybersecurity concerns all technologies that store, manipulate, or move computer data, such as computers, data networks, and all devices connected to or included in said networks, such as routers and switches. All information technology devices and facilities need to be secured against intrusion, unauthorized use, and vandalism. Users of information technology are to be protected from theft of assets, extortion, identity theft, loss of privacy, damage to equipment, business process compromise, and general disruption. The public should be protected against acts of cyberterrorism, such as compromise or denial of service.
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- playback attack
- repetition attack
- session replay attack
- interception-replay
- man-in-the-middle replay
- message replay
USAGE NOTE
Replay attacks are often prevented by implementing countermeasures like one-time passwords (OTPs), cryptographic nonces, or strict session token expiration.
DEVELOPERS
Organizations developing technology related to Replay Attack.
Develops Next-Generation Firewalls (NGFWs) and security platforms that provide stateful inspection and protocol validation, which can detect and block network-level replay attacks by identifying out-of-sequence or repeated packets.
A networking and cybersecurity leader whose security protocols, such as IPsec for VPNs, include specific anti-replay services that use sequence numbers to track packets and discard duplicates.
An Identity and Access Management (IAM) provider that mitigates replay attacks against authentication systems by using single-use tokens, nonce values, and strict session management policies within protocols like OAuth 2.0 and SAML.
Provides web security services, including a Web Application Firewall (WAF) that can protect against application-layer replay attacks by inspecting HTTP requests and managing user sessions and tokens to ensure their validity and uniqueness.
A global technology leader in aerospace, defense, and digital security. Its cybersecurity division develops cryptographic solutions and Hardware Security Modules (HSMs) that enable secure protocols with built-in anti-replay mechanisms like timestamps and cryptographic nonces.
Specializes in API security, using AI to baseline normal API traffic. The platform can detect anomalies indicative of a replay attack, such as the malicious re-sending of a valid API token or request to duplicate a transaction.
An automotive cybersecurity company that develops solutions to protect in-vehicle networks and connected car services from attacks, including replaying commands for actions like unlocking doors or starting the engine.
A major defense contractor that builds secure communication and data link systems for military applications. These systems have stringent requirements to prevent replay attacks to ensure the integrity of commands and intelligence.