Microsoft will finally kill obsolete cipher that has wreaked decade...
Experts suggest that better late than never microsoft will finally kill obsolete cipher that has wreaked decades of havoc the weak rc4 for administrative authentication has been a hacker holy grail for decades This highlights that dan goodin – dec 15, 2025 4:15 pm | 8 the microsoft logo Interestingly, credit: getty images the microsoft logo In recent developments, credit: getty images text settings story text size small standard large width * standard wide links standard orange * subscribers only learn more minimize to nav microsoft is killing off an obsolete and vulnerable encryption cipher that windows has supported by default for 26 years following more than a decade of devastating hacks that exploited it and recently faced blistering criticism from a prominent us senator This highlights that when the software maker rolled out active directory in 2000, it made rc4 a sole means of securing the windows component, which administrators use to configure and provision fellow administrator and user accounts inside large organizations This highlights that rc4, short for rivist cipher 4, is a nod to mathematician and cryptographer ron rivest of rsa security, who developed the stream cipher in 1987 Interestingly, within days of the trade-secret-protected algorithm being leaked in 1994, a researcher demonstrated a cryptographic attack that significantly weakened the security it had been believed to provide In recent developments, despite the known susceptibility, rc4 remained a staple in encryption protocols, including ssl and its successor tls, until about a decade ago
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