installing upadated Flash player .rpm in SUSE linux 12 sp2, no valid signature checksum

When installing the upgraded flash player .rpm from SLED SUSE linux desktop version 12 sp 2,  it indicates that the software is broken, since the .rpm is unsigned. Please sign a fresh copy of the software with the properly recognized signature, so that I may install the upgrade safely on my system.

Please note, that I do not want to install broken software or in the worst case malware [anti-malware software only 25% effective] with all of the zero day malware on the internet. If it was previously properly signed, some hacker could have slipped a malware infected copy on your system. It is very important to use a secure signing system which is included with the .rpm system in SUSE linux.

[Moved from the non-technical Lounge Forum to the specific Program forum... Mod]

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The error message is listed below:

Broken package
Error: INVALID:flash-plugin-26.0.0.151-release.x86_64 (file-080ee4d5): Signature verification failed [6-File
is unsigned]
Header SHA1 digest: OK (ced67ec8bfb336ac2fc845319610b2cdcf130ec3)
MD5 digest: OK (40a64151a1c2d0f926b798f56a8910c3)
Package is not signed!