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RC4

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…

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History, Description & Security

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Key facts & relationships

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Designers
Ron Rivest (RSA Security)
First published
Leaked in 1994 (designed in 1987)
Key sizes
40–2048 bits
Rounds
1
Speed
7 cycles per byte on original Pentium Modified Alleged RC4 on Intel Core 2: 13.9 cycles per byte
State size
2064 bits (1684 effective)

Topics to explore

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Overview

History

Description

Security

RC4 variants

RC4-based protocols

Advanced semantic analysis

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Map overview Semantic statistics

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RC4

Nodes101
Edges100
Triples239
Avg. degree1.98
Density0.019802
Components1

How this topic connects Entity context

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RC4

Top relations

related to External links · 36
RC4 → Arcfour, Archived, Attacks, Attacks On RC4, CryptoBytes, Cypherpunks, Entry, Fall, February, Fluhrer, I-D, IETF, Improved Arcfour Modes, January, Key Scheduling Algorithm, Mantin, November, Original, PostScript, Prohibiting RC4 Cipher SuitesKaukonen
related to history · 20
RC4 → According, ARC4, ARCFOUR, Because, Bob Jenkins, Cypherpunks, English Wikipedia, From, Internet, It, RC, RC2, RC5, RC6, Rivest, Ron's Code, Ronald Rivest, RSA Security, September, The
related to Further reading · 17
RC4 → Algorithms, Applied Cryptography, Bruce, Chapter, CRC Press, Goutam, ISBN, Its Variants, Other Stream Ciphers, Paul, Protocols, RC4 Stream Cipher, Real Random-Sequence Generators, Schneier, Source Code, Subhamoy Maitra, Wiley
related to RC4-based protocols · 15
RC4 → AES-CCMP, BitTorrent, Kerberos, Microsoft Point-to-Point EncryptionTransport Layer, Office XP, PDFSkype, Remote Desktop Protocol, RFC, SASL Mechanism Digest-MD5, Secure Shell, Secure Sockets Layer, Security, WEPTKIP, Where, WPA
related to Fluhrer, Mantin and Shamir attack · 13
RC4 → Fluhrer, IEEE, If, In, Mantin, Protocols, RC4-drop, Shamir, Such, The SCAN, This, WEP, WPA
related to Security · 13
RC4 → Because RC4, Fluhrer, However, If, MAC, Mantin, One, RC4's, Shamir, The, This, Unlike, WEP
related to NOMORE attack · 11
RC4 → Dubbed, HTTP, In, KU Leuven, NOMORE, Numerous Occurrence MOnitoring, Recovery Exploit, The, Their, TLS, WPA-TKIP
related to Roos' biases and key reconstruction from permutation · 11
RC4 → Andrew Roos, Goutam Paul, In, KSA, Roos-type, Siddheshwar Rathi, Subhamoy Maitra, Subsequently, The, These, This
related to Klein's attack · 10
RC4 → Andreas Klein, Andrei Pychkine, Erik Tews, Fluhrer, In, Mantin, Ralf-Philipp Weinmann, Shamir, WEP, Whereas
related to RC4-based random number generators · 10
RC4 → API, ARC4, As, Man, OpenBSD, Random, Replacement Call, Several, The, The API

Important terminology Word statistics

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Important terminology

key stream used bytes keystream attack cipher algorithm output number tls also permutation use wep 256 mantin first state shamir

Entity relationships Subject–Predicate–Object triples

Extracted RDF-like relationships with confidence and source. The table includes structured facts and lower-confidence contextual relations.
SubjectPredicateObjectConfidenceSrc
RC4DesignersRon Rivest (RSA Security)1.00infobox
RC4First publishedLeaked in 1994 (designed in 1987)1.00infobox
RC4Key sizes40–2048 bits1.00infobox
RC4Rounds11.00infobox
RC4Speed7 cycles per byte on original Pentium Modified Alleged RC4 on Intel Core 2: 13.9 cycles per byte1.00infobox
RC4State size2064 bits (1684 effective)1.00infobox
RC4is astream cipher0.90text
the obsolete WEP protocol historically used to secure WiFi networks.There has long been speculation that some state cryptologic agencies may possess the capability to break RC4 when used in the TLS protocolinstance ofParticularly problematic uses of RC4 have led to insecure protocols0.80text
SHA-3instance ofSpritz performs rather slowly compared to other hash functions0.80text
the best known hardware implementation of RC4.Like other sponge functionsinstance ofSpritz performs rather slowly compared to other hash functions0.80text
Spritz can be used to build a cryptographic hash functioninstance ofSpritz performs rather slowly compared to other hash functions0.80text
a deterministic random bit generatorinstance ofSpritz performs rather slowly compared to other hash functions0.80text

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