In cybersecurity, a zero-day is a security vulnerability in software or hardware that is unknown to the vendor and for which there is no patch or fix:

Data loss prevention (DLP) is a cybersecurity strategy that helps prevent the unauthorized use, transmission, or access of sensitive data.

(APT) is a covert cyber attack on a computer network where the attacker gains and maintains unauthorized access to the targeted network and remains undetected for a significant period.

If not, try to identify and report the infection to the appropriate Internet Service Provider as soon as possible as noted above, and then delete the message.

Viruses spread by infecting other programs, either on the same computer or on other computers connected to it over a network.

The CIA triad is a model that represents the three main pillars of information security: confidentiality, integrity, and availability:

A distributed denial-of-service (DDoS) attack is a cybercrime that floods a website, server, or network with malicious traffic to make it inaccessible or degrade its performance.

The Diffie-Hellman key exchange is a method for securely exchanging cryptographic keys between two parties over a public channel:

is a technology that encrypts data sent between a client and a server, such as a web browser and a website.

information security, penetration assessment, business continuity, disaster recovery, and risk management