What is XOR obfuscation?
XOR Encryption is an encryption method used to encrypt data and is hard to crack by brute-force method, i.e generating random encryption keys to match with the correct one.
Is XOR an obfuscation technique?
XOR obfuscation was used in the corpus to circumvent malware detection and reverse engineering, to hide information that was apparently being exfiltrated, and by malware detection tools for their quarantine directories and to distribute malware signatures.
What is XOR in malware?
In computer science, XOR is a type of bitwise operation used to manipulate values, along with several others to include AND, OR, NOT, etc.
Why XOR is used for encryption?
The primary reason XOR is so useful in cryptography is because it is “perfectly balanced”; for a given plaintext input 0 or 1, the ciphertext result is equally likely to be either 0 or 1 for a truly random key bit.
Why is the XOR encryption method not secure?
The problem with XOR encryption is that for long runs of the same characters, it is very easy to see the password. Such long runs are most commonly spaces in text files. Say your password is 8 chars, and the text file has 16 spaces in some line (for example, in the middle of ASCII-graphics table).
How secure is XOR encryption?
XOR encryption can be reasonably* strong if the following conditions are met: The plain text and the password are about the same length. The password is not reused for encrypting more than one message. The password cannot be guessed, IE by dictionary or other mathematical means.
How do I encrypt with XOR?
How to encrypt using XOR cipher? XOR is applied on binary data, a conversion (ASCII or Unicode) must be carried out on a non-binary text. Take the first bit ( 0 or 1 ) of the plain text and the first bit of the key and multiply then using XOR operation to get the ciphered bit.
How is XOR implemented?
XOR can also be viewed as addition modulo 2. As a result, XOR gates are used to implement binary addition in computers. A half adder consists of an XOR gate and an AND gate….XOR gate.
| Input | Output | |
|---|---|---|
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
Can XOR encryption be cracked?
The target of a good encryption is to make it mathematically difficult to decrypt without the key. This includes the desire to protect the key itself. The XOR technique is basically a very simple cipher easily broken as described here.
Is XOR encryption secure?
for something more secure you could try manipulating your key during encryption like AES (Rijndael). AES actually does XOR times and modifies the key each repeat of the key using a switch table. It became an internation standard so its quite secure.
Why do we use XOR?
If both inputs are false (0/LOW) or both are true, a false output results. XOR represents the inequality function, i.e., the output is true if the inputs are not alike otherwise the output is false. A way to remember XOR is “must have one or the other but not both”….XOR gate.
| Input | Output | |
|---|---|---|
| 1 | 1 | 0 |
How does XOR function work?
The XOR logical operation, exclusive or, takes two boolean operands and returns true if, and only if, the operands are different. Conversely, it returns false if the two operands have the same value.