Elliptic Curve Cryptography

Saturday, May 21, 2016

Elliptic Curve Cryptography ECC is an approach to public key cryptography based on elliptic curves over finite fields. The security of ECC systems rests on the elliptic curve discrete logarithm problem, rather than the RSA's integer factorization problem. ECC allows devices to maintain a high security bar. ECC uses smaller keys than RSA for the same cryptographic strength. Symmetric Key Size (bits) RSA Key Size (bits) Elliptic Curve Key size (bits) 80 1024 160 112 2048 224 128...

How to resolve Exchange 2010 error message: The Certificate Status could not be determined because the revocation check failed

Tuesday, September 20, 2011

The following error/s may appear in the Exchange 2010 Management Console: “Exchange 2010 Certificate Revocation Checks and Proxy Settings” or “The Certificate Status could not be determined because the revocation check failed” Cause: 1. You may use a Proxy server that block access to the CRL. 2. The CRL isn't available. How to Debug this issue: Obtain any (current) certificate from the Certificate Authority and run the following command: “certutil –verify –urlfetch C:\CertificateName.cer >Log.txt” Usually you may find out issues like errors messages on expired CRL or Offline CA. Resolutions: 1. Review Proxy settings by using “netsh winhttp show...