Basiclly the same question as Allowing unsigned Java applications on all sites, but for Java 8, where I get the pleasure of seeing this screen:
Unsurprisingly, this breaks things for me. Is there some way to work around this ludicrous decision besides installing Java 7?
Reference How do I control when an untrusted applet or application runs in my web browser? :
Starting with Java 8 Update 20, the Medium security level has been removed from the Java Control Panel. Only High and Very High levels are available.
The exception site list provides users with the option of allowing the same applets that would have been allowed by selecting the Medium option but on a site-by-site basis therefore minimizing the risk of using more permissive settings.
You may have to restart your browser for the settings to take effect.
I know you're looking for unsigned, but I had issues with running an app signed with MD5 with RSA. I found the following solution worked for me, maybe it can get you started down the right path:
all applications signed by MD5withRSA are now treated by "unapproved"
but luckily you can quickly override this by updating C:\Program Files (x86)\Java\jre1.8.0_131\lib\security\java.security
i've opened java.security file with notepad and made next few changes (removed MD5 exclusion):
jdk.jar.disabledAlgorithms=MD2, RSA keySize < 1024
jdk.tls.disabledAlgorithms=SSLv3, RC4, DH keySize < 768, \ EC keySize < 224
jdk.tls.legacyAlgorithms= \ K_NULL, C_NULL, M_NULL, \ DHE_DSS_EXPORT, DHE_RSA_EXPORT, DH_anon_EXPORT, DH_DSS_EXPORT, \ DH_RSA_EXPORT, RSA_EXPORT, \ DH_anon, ECDH_anon, \ RC4_128, RC4_40, DES_CBC, DES40_CBC, \ 3DES_EDE_CBC, \ SSL_RSA_WITH_RC4_128_MD5
ig.secureValidationPolicy=\ disallowAlg http://www.w3.org/TR/1999/REC-xslt-19991116,\ disallowAlg http://www.w3.org/2001/04/xmldsig-more#hmac-md5,\ disallowAlg http://www.w3.org/2001/04/xmldsig-more#md5,\ maxTransforms 5,\ maxReferences 30,\ disallowReferenceUriSchemes file http https,\ minKeySize RSA 1024,\ minKeySize DSA 1024,\ noDuplicateIds,\ noRetrievalMethodLoops
