How Ransomware Encrypts File
Ransomware encrypts files using AES and RSA Encryptions. What exactly are AES and RSA?
Advanced Encryption Standard (AES) is an encryption algorithm used to prevent data theft and unauthorized access to sensitive information. NSA uses AES to keep their top secrets secure against cyber espionage. In AES, a string is divided into 128 bits per block. Each block is provided with a key. With each round, a ciphertext is generated out of the other encryption keys. Basically, you end up getting all the 128 bits encrypted, making it impossible to crack.
RSA Encryption is an asymmetric encryption system introduced in 1973. It stands for Rivest, Shamir, and Adleman. To cipher a message, it is converted into a number raised to the power of the first number and divided into a constant factor. The standard key length is set to a minimum of 3072 bits because a key length higher than 768 bits is almost impossible to decipher.
This prepare of converting plaintext to ciphertext combined with malware comes about in ransomware. That’s how ransomware encrypts files.
Ransomware encrypting files is such an inconvenience both to consumers and companies. If ransomware encrypted your files, considering alternative methods to restore your files is worth a try.
We’ll show you how to recover ransomware encrypted files without having to pay the ransom.