Some issues that you may encounter after applying this update may include: This update will block the use of cryptographic keys that are less than 1024 bits. To further reduce the risk of unauthorized exposure of sensitive information, Microsoft has created a software update that will be released in August 2012 for the following operating systems: Windows XP, Windows Server 2003, Windows Server 2003 R2, Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2.
As such, we are further hardening our criteria for the RSA algorithm with key length less than 1024 bits. The threat landscape continues to evolve. The algorithm is deemed to be strong enough when the time required to derive private key is prohibitive enough using the computing power at disposal.
Public key based cryptographic algorithms strength is determined based on the time taken to derive the private key using brute force methods. First published on TECHNET on Jun 11, 2012
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