Dec 15, 2025 · 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.

Microsoft is finally ripping out one of the weakest links in its identity stack, cutting off a legacy cipher that attackers have abused for years to walk straight into corporate networks. The move ...

6 days ago · Microsoft is killing off an obsolete and vulnerable encryption cipher that Windows has supported by default for 26 years. This follows more than a decade of devastating hacks that …

4 days ago · Go Deeper -> Beyond RC4 for Windows authentication – Microsoft Microsoft will finally kill obsolete cipher that has wreaked decades of havoc – ARS Technica

6 days ago · Microsoft is officially moving to shut the door on RC4 - a legacy cryptographic cipher that has quietly persisted inside Windows authentication environments for decades - and …

Dec 16, 2025 · microsoft will finally kill obsolete cipher that Microsoft is set to retire an outdated and vulnerable encryption cipher that has been a part of Windows for 26 years, following years …

6 days ago · Ancient cypher meets its end after years of hacks and warnings Software King of the World, Microsoft, is pulling the plug on RC4, an obsolete and leaky encryption cypher it has …