deb包安装问题

cnhnln

[code:1]localhost:/var/cache/apt/archives# dpkg -i cpuser_id_3.3-2_i386.deb
Authenticating cpuser_id_3.3-2_i386.deb ...
debsig: Origin Signature check failed. This deb might not be signed.

dpkg: error processing cpuser_id_3.3-2_i386.deb (--install):
Verification on package cpuser_id_3.3-2_i386.deb failed!
Errors were encountered while processing:
cpuser_id_3.3-2_i386.deb[/code:1]
apt也一样
之前安装了许多软件。所以也不知道是哪个包引起的

求助，多谢