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Please Note:

Sign and SignVerify Data using an EC Key

To Sign and SignVerify data using an EC key:

Create a NAE Session. Pass the NAE username, password, property file path as arguments.
```
NaeSession session = new NaeSession(user, passwd, propFilePath);
```
Create NaeECIESKey object. Pass NaeSession object and curve as argument.
```
NaeECIESKey ecKey = new NaeECIESKey (session, curve);
```
Curve can be set to NaeECIESKey.SupportedCurves.brainpoolP256r1_256

Set the Hash algorithm.

HashAlgorithmName algorithm = HashAlgorithmName.SHA256;

Call the SignData API and pass input bytes, hashing algorithm name as arguments to get the signed bytes.
```
byte[] outBytes = ecKey.SignData(inputBytes, hashalgorithm);
```
Call the VerifyData API. Pass the signed bytes, input bytes, offset, count, and hashing algorithm name as arguments for the verification of signed data.
```
bool result = ecKey.VerifyData(inputBytes, offset, count, outBytes, hashalgorithm);
```