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Microsoft removes all downloads signed with SHA-1
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Microsoft removes all downloads signed with SHA-1

Microsoft removes all Windows Download Center downloads signed using SHA-1 certificates on August 3, 2020.

The SHA-1 algorithm was commonly used to sign executable file code, and TLS and SSL certificates are used on websites to authenticate a publisher.sha - Microsoft removes all downloads signed with SHA-1

In 2015, security researchers published a report which describes in detail how SHA-1 is vulnerable to attacks that could allow intruders to forge digital certificates to impersonate a company or other site.

These forgeries could then be used in phishing attacks, corporate forgeries or man-in-the-middle attacks.

Due to problems with certificates SHA-1, Microsoft and other developers are starting to use them and demand its use SHA-2 to install Windows updates.

In a new newsletter released yesterday, Microsoft says it is withdrawing all Windows content signed with the Secure Hash 1 (SHA-1) algorithm from the Microsoft Download Center for added security.

"SHA-1 is an old cryptographic hash that many in the security community believe is no longer secure. "Using the SHA-1 algorithm in digital certificates could allow an attacker to falsify content, carry out phishing attacks or man-in-the-middle attacks."

Note that although Microsoft only supports signed content with SHA-2 in official content, Windows executables signed with SHA-1 will still be able to run on the operating system.

So if you have previously signed files with SHA-1 and you still use them, you must download them before Microsoft removes them on August 3rd.

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