What is the RC4 algorithm?
What is the RC4 algorithm?
RC4 is a stream cipher and variable-length key algorithm. This algorithm encrypts one byte at a time (or larger units at a time).
Which encryption algorithm is based on RC4 algorithm?
The RC4 encryption algorithm is used by standards such as IEEE 802.11 within WEP (Wireless Encryption Protocol) using 40 and 128-bit keys. Published procedures exist for cracking the security measures as implemented in WEP.
What primitive operations are used in RC4?
The primitive operations are used in RC4 is bit-wise EXCLUSIVE-OR (X-OR) operation. For encryption, perform the X-OR operation on the key (k) and next byte of plain text.
Is RC4 a symmetric cipher?
RC4 is a stream symmetric cipher. It operates by creating long keystream sequences and adding them to data bytes. RC4 encrypts data by adding it XOR byte by byte, one after the other, to keystream bytes. The whole RC4 algorithm is based on creating keystream bytes.
Where is RC4 algorithm used?
RC4 is one of the most commonly used stream ciphers, having been used in Secure Socket Layer (SSL)/ Transport Layer Security (TLS) protocols, IEEE 802.11 wireless LAN standard, and the Wi-Fi Security Protocol WEP (Wireless Equivalent Protocol).
What does RC4 stand for?
Rivest Cipher 4
In cryptography, RC4 (Rivest Cipher 4 also known as ARC4 or ARCFOUR meaning Alleged RC4, see below) is a stream cipher. While it is remarkable for its simplicity and speed in software, multiple vulnerabilities have been discovered in RC4, rendering it insecure.
Which of the following RC4 algorithm is not used?
Which one of the following RC4 algorithm not used in? Explanation: RC4 is used in Secure Socket Layer, Transport Layer Security and Wired Equivalency Privacy. Not used in File Transfer Protocol. 11.
Why is RC4 A stream cipher?
RC4 means Rivest Cipher 4 invented by Ron Rivest in 1987 for RSA Security. It is a Stream Ciphers. RC4 stream cipher is one of the most widely used stream ciphers because of its simplicity and speed of operation. It is a variable key-size stream cipher with byte-oriented operations.
Which of the following encryption algorithm is based on the RC4 algorithm and 48 bits of initialization vector?
WEP
WEP was the first wireless “secure” model that was supposed to add authentication and encryption. It is based on RC4 algorithm and 24 bits of Initialization Vector (IV).
Where is RC4 used in the real world?
The RC4 stream cipher is one of the most widely-used real-world cryptosystems. Since its development in 1980’s, RC4 has been used in various software appli- cations and standard protocols such as Microsoft Office, Secure Socket Layer (SSL), Wired Equivalent Privacy (WEP).
Which one of the following algorithm is not used in asymmetric key cryptography?
Which one of the following algorithm is not used in asymmetric-key cryptography? Explanation: Electronic code book algorithm is a block cipher method in which each block of text in an encrypted message corresponds to a block of data. It is not feasible for block sizes smaller than 40 bits.
What is considered to be the strongest encryption algorithm?
Triple Data Encryption Standard (TripleDES) This form of data encryption algorithm applies block cipher algorithms thrice to all the data blocks individually.
What is the best algorithm for encryption?
AES is the best and trusted algorithm for encryption. The Advanced Encryption Standard (AES) is the algorithm trusted as the standard by the U.S. Government and numerous organizations.
What is RC4 encryption?
RC4 Encryption Algorithm. The RC4 Encryption Algorithm, developed by Ronald Rivest of RSA , is a shared key stream cipher algorithm requiring a secure exchange of a shared key. RC4 is no longer considered secure and careful consideration should be taken regarding it’s use.
