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我已經從IdenTrust向我和客戶的系統安裝了認證。但是，只有我的可以正確運行。System.Security.Cryptography.BCryptHashAlgorithm。此平臺不支持指定的加密算法
我的本地計算機：Window 8，IIS 7.5，.Net v4
我們的客戶的系統：Windows Server 2003，IIS 6，.NET v4。
認證：
版本：V3
簽名算法：sha1RSA
簽名算法有：SHA1
問：
1. MSDN表示該類在以下操作系統上受支持：Window 7，Windows Vista SP1或更高版本，Windows XP SP3，Windows Server 2008（R2）。這是客戶系統無法正確運行的問題嗎？
2.我的客戶系統運行着很多產品，所以在不久的將來幾乎不可能升級。有什麼方法可以解決嗎？
請給我一些建議。我對這方面的知識不多。
這是異常的細節。
2015-04-01 20:09:48,296 [5] INFO - TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Attempting to assign values from the properties file.
2015-04-01 20:09:48,296 [5] INFO - OTPAuthenticator :: TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Calling method to retrieve private key.
2015-04-01 20:09:48,296 [5] INFO - OTPAuthenticator :: TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Attempting to locate the private key.
2015-04-01 20:09:48,374 [5] INFO - OTPAuthenticator :: TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Acquired private key...beginning direct authentication.
2015-04-01 20:09:48,390 [5] INFO - OTPAuthenticator :: TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Beginning direct authentication...
2015-04-01 20:09:48,390 [5] INFO - OTPAuthenticator :: TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Authenticator service instance created.
2015-04-01 20:09:48,390 [5] INFO - OTPAuthenticator :: TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Calling service and requesting challenge...
2015-04-01 20:09:48,906 [5] INFO - OTPAuthenticator :: TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Challenge received.
2015-04-01 20:09:48,906 [5] INFO - OTPAuthenticator :: TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Signing challenge...
2015-04-01 20:09:48,906 [5] ERROR - OTPAuthenticator :: directUserPKIAuth :: Failed to successfully create session. Direct authentication failed.
The specified cryptographic algorithm is not supported on this platform.System.PlatformNotSupportedException: The specified cryptographic algorithm is not supported on this platform.
at System.Security.Cryptography.BCryptHashAlgorithm..ctor(CngAlgorithm algorithm, String implementation)
at System.Security.Cryptography.SHA1Cng..ctor()
at TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator.directUserPKIAuth(String systemId, AsymmetricAlgorithm privateKey)
2015-04-01 20:09:48,921 [5] FATAL - OTPAuthenticator :: TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Exception encountered when attempting to authenticate.
Failed to successfully create session. Direct authentication failed. The specified cryptographic algorithm is not supported on this platform.System.PlatformNotSupportedException: The specified cryptographic algorithm is not supported on this platform.
at System.Security.Cryptography.BCryptHashAlgorithm..ctor(CngAlgorithm algorithm, String implementation)
at System.Security.Cryptography.SHA1Cng..ctor()
at TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator.directUserPKIAuth(String systemId, AsymmetricAlgorithm privateKey)TwoFactorAuthentication.com.identrust.otp.authentication.Exceptions.ChallengeFailedException: Failed to successfully create session. Direct authentication failed. The specified cryptographic algorithm is not supported on this platform.System.PlatformNotSupportedException: The specified cryptographic algorithm is not supported on this platform.
at System.Security.Cryptography.BCryptHashAlgorithm..ctor(CngAlgorithm algorithm, String implementation)
at System.Security.Cryptography.SHA1Cng..ctor()
at TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator.directUserPKIAuth(String systemId, AsymmetricAlgorithm privateKey)
at TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator.directUserPKIAuth(String systemId, AsymmetricAlgorithm privateKey)
at TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator.authenticateTwoFactorOTP(String uid, String pwd, String otp)
2015-04-01 20:09:48,921 [5] ERROR - OTPAuthenticator :: TwoFactorAuthentication.com.identrust.otp.authentication.OTPAuthenticator :: Overall result of two-factor authentication (OTP/Pwd): FAILED.
非常感謝。