Digital Certificates And Cryptographic Key Generator
![Cryptographic key types Cryptographic key types](https://upload.wikimedia.org/wikipedia/commons/thumb/6/65/PublicKeyCertificateDiagram_It.svg/550px-PublicKeyCertificateDiagram_It.svg.png)
- Digital Certificates And Cryptographic Key Generator Download
- Cryptographic Key Management Software
- Cryptographic Key Management
- Digital Certificates And Cryptographic Key Generator Reviews
- Digital Certificates And Cryptographic Key Generator Free
PKI - Public Key Infrastructure. Public Key Infrastructure (PKI) is a technology for authenticating users and devices in the digital world. The basic idea is to have one or more trusted parties digitally sign documents certifying that a particular cryptographic key belongs to a particular user or device. Key Usage: The valid cryptographic uses of the certificate's public key. Common values include digital signature validation, key encipherment, and certificate signing. Extended Key Usage: The applications in which the certificate may be used. Common values include TLS server authentication, email protection, and code signing.
A public key certificate, also known as a digital certificate or identity certificate, is an electronic document used to prove the ownership of a public key. The certificate includes information about the key, the identity of its owner (called the subject), and the digital signature of an entity that has verified the certificate’s contents. Decode Public key or Certificate Request keyblob Certificate Decoder HTTP URL Monitor HTML Debugger: getaCert is a free service which provides a fast and simple way to create or view the details of a SSL digital certificate. Digital certificates issued on this site can be used for encrypting emails and/or web sites.
-->Digital Certificates And Cryptographic Key Generator Download
Cryptographic digital signatures use public key algorithms to provide data integrity. When you sign data with a digital signature, someone else can verify the signature, and can prove that the data originated from you and was not altered after you signed it. For more information about digital signatures, see Cryptographic Services.
This topic explains how to generate and verify digital signatures using classes in the System.Security.Cryptography namespace.
Generating Signatures
Digital signatures are usually applied to hash values that represent larger data. The following example applies a digital signature to a hash value. First, a new instance of the RSACryptoServiceProvider class is created to generate a public/private key pair. Next, the RSACryptoServiceProvider is passed to a new instance of the RSAPKCS1SignatureFormatter class. This transfers the private key to the RSAPKCS1SignatureFormatter, which actually performs the digital signing. Before you can sign the hash code, you must specify a hash algorithm to use. This example uses the SHA1 algorithm. Finally, the CreateSignature method is called to perform the signing.
Due to collision problems with SHA1, Microsoft recommends SHA256 or better.
Signing XML Files
The .NET Framework provides the System.Security.Cryptography.Xml namespace, which enables you sign XML. Signing XML is important when you want to verify that the XML originates from a certain source. For example, if you are using a stock quote service that uses XML, you can verify the source of the XML if it is signed.
The classes in this namespace follow the XML-Signature Syntax and Processing recommendation from the World Wide Web Consortium.
Verifying Signatures
To verify that data was signed by a particular party, you must have the following information:
The public key of the party that signed the data.
The digital signature. Generate api key and secret java.
The data that was signed.
The hash algorithm used by the signer.
Cryptographic Key Management Software
To verify a signature signed by the RSAPKCS1SignatureFormatter class, use the RSAPKCS1SignatureDeformatter class. The RSAPKCS1SignatureDeformatter class must be supplied the public key of the signer. You will need the values of the modulus and the exponent to specify the public key. (The party that generated the public/private key pair should provide these values.) First create an RSACryptoServiceProvider object to hold the public key that will verify the signature, and then initialize an RSAParameters structure to the modulus and exponent values that specify the public key.
Cryptographic Key Management
The following code shows the creation of an RSAParameters structure. The Modulus
property is set to the value of a byte array called modulusData
and the Exponent
property is set to the value of a byte array called exponentData
.
After you have created the RSAParameters object, you can initialize a new instance of the RSACryptoServiceProvider class to the values specified in RSAParameters. The RSACryptoServiceProvider is, in turn, passed to the constructor of an RSAPKCS1SignatureDeformatter to transfer the key.
![Digital certificates and cryptographic key generator reviews Digital certificates and cryptographic key generator reviews](https://www.juniper.net/documentation/images/g030621.gif)
The following example illustrates this process. In this example, hashValue
and signedHashValue
are arrays of bytes provided by a remote party. The remote party has signed the hashValue
using the SHA1 algorithm, producing the digital signature signedHashValue
. The RSAPKCS1SignatureDeformatter.VerifySignature method verifies that the digital signature is valid and was used to sign the hashValue
.
Digital Certificates And Cryptographic Key Generator Reviews
This code fragment will display 'The signature is valid
' if the signature is valid and 'The signature is not valid
' if it is not.