What is SHA-2
Entrust SSL Certificates, Powered by SHA-2 Security
Developed by the National Institute of Standards and Technology (NIST), SHA-2 represents the most current set of cryptographic hash functions. At a micro level, SHA-2 is based on a set of four hash functions — 224, 256, 384 or 512 bits — which strengthens the original SHA-1 hash function released in 1995 by the NIST.
To provide maximum compatibility, Entrust Certificate Services customers have the choice to sign any Entrust digital certificate with SHA-1 or SHA-2, though SHA-2 is now the recommended hash function, as SHA-1 is in the process of being rapidly deprecated by the browsers.
In fact, the SHA-2 standard may be used with all of Entrust's digital certificates, including Code Signing.
Though most organizations won't experience any compatibility difficulties, some older systems — such as those running Microsoft Windows XP SP2 (or older) or outdated Web browsers — are unable to support SHA-2 encryption. In these situations, administrators are recommended to upgrade these systems to SHA-2-supported configurations if they rely on the users’ browsers providing public trust.Migrate from SHA-1