JWT签名验证失败

Question

我在验证JWT签名时遇到一个非常奇怪的错误，这在本地运行Web应用程序时工作正常但是当部署到服务器时我收到此错误：

“消息：IDX10503：签名验证失败。密钥尝试：'System.IdentityModel.Tokens.InMemorySymmetricSecurityKey \ r \ n'。\ n捕获的异常：\ n''。\ ntoken：'{\”typ \“：\ “JWT \”，\ “ALG \”：\ “HS256 \”} .....

我像这样创建我的令牌

var securityKey = Encoding.UTF8.GetBytes(secret);

    var tokenHandler = new JwtSecurityTokenHandler();

    // Token Creation
    var now = DateTime.UtcNow;
    var tokenDescriptor = new SecurityTokenDescriptor
    {
        Subject = identity,
        TokenIssuerName = "self",                
        AppliesToAddress = "http://example.com",
        Lifetime = new Lifetime(now, now.AddMinutes(2)),
        SigningCredentials = new SigningCredentials(
     new InMemorySymmetricSecurityKey(securityKey),
     "http://www.w3.org/2001/04/xmldsig-more#hmac-sha256",
     "http://www.w3.org/2001/04/xmlenc#sha256"),
    };
    var token = tokenHandler.CreateToken(tokenDescriptor);

    return tokenHandler.WriteToken(token);

并验证如下：

        // Create token validation parameters for the signed JWT
        // This object will be used to verify the cryptographic signature of the received JWT
        TokenValidationParameters validationParams =
            new TokenValidationParameters()
            {
                ValidAudience = "http://example.com",
                ValidIssuer = "self",
                IssuerSigningToken = new BinarySecretSecurityToken(Encoding.UTF8.GetBytes(secret)),
            };

        var tokenHandler = new JwtSecurityTokenHandler();

        //   tokenHandler.ValidateToken(token, validationParams);

        SecurityToken st;
        principal = tokenHandler.ValidateToken(token, validationParams, out st);
        return true;

调用“token.ValidateToken（..）”

时发生错误

有什么想法吗？