If someone else gets these private keys, they can impersonate your signature. You will be placing your keys in javakeystore_keepsecret.jks - this file will contain private keys and therefore should not be shared.Most public Certificate Authorities will sign something for one to five years. Two years or 730 days is a reasonable compromise between not-long-enough and too-long. The sigalg of EC ( Elliptical Curve) and keysize of 571 will give your key a good strong lifetime.Substitute your name of something like "mykey." The alias "erikcostlow" is my name and therefore easy to remember.Keytool -genkeypair -alias erikcostlow -keyalg EC -keysize 571 -validity 730 -keystore javakeystore_keepsecret.jks Having a public/private key pair will give you the ability both to sign items yourself and issue a Certificate Signing Request (CSR) to a certificate authority.Ĭreate your public/private key pair by following the instructions for creating key pairs.Įvery Certificate Authority that I looked at provided similar instructions, but for the sake of cohesiveness I will include the commands that I used here: Importing your certificate onto machines that should trust youĬreating a public/private key pair for signing.Exporting your public certificate for others.Creating a public/private key pair for signing.There are several steps required to distribute a self-signed certificate to users so that they will properly trust it. How to distribute self-signed certificates for a known community Managed machines help this because you can automate the rollout, but they are not required - the major point simply that people will trust and import your certificate. Public Certificate Authorities are widely trusted already because they abide by many different requirements and frequent checks.Īn example would be students in a university class sharing their public certificates on a mailing list or web page, employees publishing on the intranet, or a system administrator rolling certificates out to end-users. This works for known communities where people will trust that my certificate is mine, but does not scale widely where I cannot actually contact or know the systems that will need to trust my certificate. The difference between self-signed and purchased-from-CA is that your users must import your self-signed certificate to indicate that it is valid, whereas Certificate Authorities are already trusted by default. You may still use self-signed certificates within a known community. The role of self-signed certificates within a known community This post is written to help users that need to use self-signed certificates without involving a public Certificate Authority. Code signatures are a common practice recommended in the industry because they help determine that the code your computer will run is the same code that the publisher created. Recently announced changes scheduled for Java 7 update 51 (January 2014) have established that the default security slider will require code signatures and the Permissions Manifest attribute.
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