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The symmetric key is randomly generated and will not assist other victims. The victim deciphers the encrypted data with the needed symmetric key thereby completing the cryptovirology attack. The attacker receives the payment, deciphers the asymmetric ciphertext with the attacker's private key, and sends the symmetric key to the victim.The victim sends the asymmetric ciphertext and e-money to the attacker.
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It puts up a message to the user that includes the asymmetric ciphertext and how to pay the ransom.
It zeroizes the symmetric key and the original plaintext data to prevent recovery. This is known as hybrid encryption and it results in a small asymmetric ciphertext as well as the symmetric ciphertext of the victim's data. It uses the public key in the malware to encrypt the symmetric key. To carry out the cryptoviral extortion attack, the malware generates a random symmetric key and encrypts the victim's data with it.The attacker generates a key pair and places the corresponding public key in the malware.Cryptoviral extortion is the following three-round protocol carried out between the attacker and the victim.
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It is called cryptoviral extortion and it was inspired by the fictional facehugger in the movie Alien. The concept of file-encrypting ransomware was invented and implemented by Young and Yung at Columbia University and was presented at the 1996 IEEE Security & Privacy conference.
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Security information and event management (SIEM).Host-based intrusion detection system (HIDS).