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    <p>Here is the full code if anyone if interested:</p> <pre><code>internal class CloudFrontSecurityProvider { private readonly RSACryptoServiceProvider privateKey; private readonly string privateKeyId; private readonly SHA1Managed sha1 = new SHA1Managed(); public CloudFrontSecurityProvider(string privateKeyId, string privateKey) { this.privateKey = new RSACryptoServiceProvider(); RSACryptoServiceProvider.UseMachineKeyStore = false; this.privateKey.FromXmlString( privateKey ); this.privateKeyId = privateKeyId; } private static int GetUnixTime(DateTime time) { DateTime referenceTime = new DateTime(1970, 1,1); return (int) (time - referenceTime).TotalSeconds; } public string GetCannedUrl(string url, DateTime expiration) { string expirationEpoch = GetUnixTime( expiration ).ToString(); string policy = @"{""Statement"":[{""Resource"":""&lt;url&gt;"",""Condition"":{""DateLessThan"":{""AWS:EpochTime"":&lt;expiration&gt;}}}]}". Replace( "&lt;url&gt;", url ). Replace( "&lt;expiration&gt;", expirationEpoch ); string signature = GetUrlSafeString( Sign( policy ) ); return url + string.Format("?Expires={0}&amp;Signature={1}&amp;Key-Pair-Id={2}", expirationEpoch, signature, this.privateKeyId); } private static string GetUrlSafeString(byte[] data) { return Convert.ToBase64String( data ).Replace( '+', '-' ).Replace( '=', '_' ).Replace( '/', '~' ); } private byte[] Sign(string data) { byte[] plainbytes = Encoding.UTF8.GetBytes(data); byte[] hash = sha1.ComputeHash(plainbytes); return this.privateKey.SignHash(hash, "SHA1"); } } </code></pre>
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    1. COBe careful with the expiration time that is passed in. It needs to be related to UTC time.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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