How to update certificate to use the SHA-2 hashing algorithm
Followed by National Institute of Standards and Technology (NIST) recommendations certificates encrypted with the Secure Hash Algorithm-1 (SHA-1) algorithm will stop supporting after 2017.Accourding to experts, using the SHA-1 hashing algorithm in digital certificates could allow an attacker to spoof content, perform phishing attacks, or perform man-in-the-middle attacks.SHA-1(more than 98%) is currently the most widely used digest algorithm.
Microsoft is announcing a policy change to the Microsoft Root Certificate Program and Windows will stop accepting SHA-1 end-entity certificates by January 1, 2017, and will stop accepting SHA-1 code signing certificates without timestamps after January 1, 2016.
Google Chrome has started warning end users when they connect to a secure website using SSL certificates encrypted with the SHA-1 algorithm (read google blog http://googleonlinesecurity.blogspot.in/2014/09/gradually-sunsetting-sha-1.html).
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