Therefore, if I give you my public key, you can use it to create an encrypted message that only I can read. Furthermore, if you know only one key, it is very difficult to compute the other. The keys have a special, asymmetric relationship, such that a message encrypted with one key can only be decrypted with the other key. In a public-key system, there are two pieces of information: a public key and a private one. However, the basics are important and interesting. (He could, of course, attach his own signature, but that would be like signing the stick-up note you hand to the bank teller.)ĭigital signatures are based on public-key cryptography, which is well beyond the scope of this book. And he can't generate a new signature at least, he can't generate a signature claiming that the document came from its original sender. Some malicious person can't clip out a digital signature, modify the original document (or applet), and attach the old signature to the result. In other words, you know who the sender is, and that the data you received is exactly what the sender sent. Furthermore, digital signatures provide another benefit: they allow you to authenticate the contents of a document, proving that it hasn't been altered in transit. In reality, a digital signature is much more difficult to forge than a traditional signature. Like their inky analogs, digital signatures associate a name with an item in a way that is difficult to forge. But how do you know that this person really is who he says he is? And what if you downloaded the applet from a third-party location, like an archive? How can you be sure that someone hasn't modified the applet since the author wrote it? With Java's default security policies for web browsers, such an applet can't do anything serious, but when we're talking about granting additional privileges to applets coming from trusted sites, you would be in for troubleif it weren't for digital signatures. You trust that this particular author wouldn't intentionally distribute something harmful. X and not an imposter? Just as important for Java, let's say that you've downloaded a great new applet written by your favorite author, Pat Niemeyer, and you'd like to grant it some additional privileges, so that it can do something cool for you. X, how do you know that the message really came from Ms. They solve one of the Internet's biggest problems: given that you've received a message from Ms. (you can import the file (PEM format) directly into the KeyStore Explorer (I think.Digital signatures provide a way to authenticate documents and other data. If it is running over HTTP: just attach your browser to the endpoint: and then download the CERTIFICATE: and install that it into your Java Trust Store. If you are trying to attach your PRPC system to an existing third-party system which is running over SSL: then you can ask them for the certificate (if it is self-signed) : or you can extract it yourself. This method is usually only suitable for testing (you are using a SELF-SIGNED CERTIFICATE here): generally you have to pay a trusted organization (Verisign etc) to SIGN your CERTIFICATE which saves you having to import the CERTIFICATE into your TRUSTSTORE (instead the trust will be based on the fact that your TRUSTSTORE contains a list of trusted authorities (including Verisign) and will accept a signed CERTIFICATE instead). Your CLIENT (because it has a reference copy in it's TRUSTSTORE) will TRUST this SERVER and allow the Secure Connection to continue. When you attach your CLIENT to the SERVER: one of the first things your SERVER will do - is to provide this CERTIFCATE to your CLIENT. IMPORT the CERTIFICATE into your CLIENT's TRUSTSORE. Export your CERTIFICATE from this KEYPAIR: this is the non-secret side of your KEYPAIR - it doesn't have a password and everybody gets access it.ģ. (this isn't strictly necessary - but some clients will use 'hostname verification' on the certificate, and reject certificates unless this is the case).Ģ. You probably want to set the 'name' field of the certificate to be the same as the server's hostname. You will keep one half the key secret (with a password that only you know). Create a KEYPAIR on the server (say webserver, but could be emailserver or soap service etc). Create a KEYSTORE on your server (or use an existing one).ġ. The overview of doing this (if you want to setup a server and a client) is essentially this:Ġ. There are many tutorials on the web about doing this kind of thing using the 'keytool' commandline tool (for example: To Use keytool to Create a ServerCertificate (The Java EE 6 Tutorial)) : but I think using a GUI such as 'keystore explorer' is easier : Generating Certficates / Keystores is done outside of PRPC - and follows the standard methods for creating key-pairs, exporting certificates and importing trusted certificates. Robotic Process Automation Design Patterns Pega Robotic Automation Release and Build Notes
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