Also known as ARC4, ARCFOUR, Rivest Cipher 4, Ron's Code 4, RC4 Cipher Suites
In cryptography, RC4 (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. It is especially vulnerable when the beginning of the output keystream is not discarded, or when nonrandom or related keys are used. Particularly problematic uses of RC4 have led to insecure protocols such as the obsolete WEP protocol historically used to secure WiFi networks.
Key facts
- Encryption method.name
- RC4
- Encryption method.designers
- Ron Rivest (RSA Security)
- Encryption method.publish date
- Leaked in 1994(designed in 1987)
- Encryption method.key size
- 40– bits
- Encryption method.state size
- bits ( effective)
- Encryption method.rounds
- 1
- Encryption method.speed
- 7 cycles per byte on original PentiumModified Alleged RC4 on Intel Core 2: 13.9 cycles per byte
via Wikipedia infobox
Wikidata facts
- Instance of
- stream cipher
- Designed by
- Ron Rivest
- Image
- RC4.svg
Show 2 more facts
- described at URL
- tools.ietf.org/html/draft-kaukonen-cipher-arcfour-03
- inception
- 1987-00-00
Sources (2)
via Wikidata · CC0
Article · Português
Em criptografia, RC4 (ou ARC4, de Alleged RC4, ver abaixo) era o algoritmo simétrico de criptografia de fluxo mais usado no software e era utilizado nos protocolos mais conhecidos, como Secure Socket Layers (SSL, hoje conhecido como TLS) (para proteger o tráfego Internet) e WEP (para a segurança de redes sem fios, obsoleto, hoje se usa o WPA). O RC4 não é considerado um dos melhores sistemas criptográficos pelos adeptos da criptografia, e em algumas aplicações podem converter-se em sistemas muito inseguros. No entanto, alguns sistemas baseados em RC4 são seguros o bastante num contexto prático.
Abstract from DBpedia / Wikipedia · CC BY-SA