macports self update failed

[lauramdegroot@…]

Hello. I successfully installed macports on my computer (Mac OS X 10.10.4), but when I run the self update I get an error. I then ran:

$ sudo port -d selfupdate

and got the following:

DEBUG: Copying /Users/pongo/Library/Preferences/com.apple.dt.Xcode.plist to /opt/local/var/macports/home/Library/Preferences DEBUG: MacPorts sources location: /opt/local/var/macports/sources/rsync.macports.org/release/tarballs ---> Updating MacPorts base sources using rsync receiving file list ... done

sent 36 bytes received 69 bytes 70.00 bytes/sec total size is 27013120 speedup is 257267.81 receiving file list ... done

sent 36 bytes received 76 bytes 74.67 bytes/sec total size is 512 speedup is 4.57 DEBUG: failed verification with key /opt/local/share/macports/macports-pubkey.pem DEBUG: openssl output: Verification Failure child process exited abnormally DEBUG: Failed to verify signature for MacPorts source!

while executing

"macports::selfupdate [array get global_options] base_updated" Error: Failed to verify signature for MacPorts source! To report a bug, follow the instructions in the guide:

​http://guide.macports.org/#project.tickets

Error: /opt/local/bin/port: port selfupdate failed: Failed to verify signature for MacPorts source!

I saw something similar to this on another ticket, but I couldn't figure out the solution. Could someone help? Overall, I need to use macports to install ATLAS 3.10.2, so any suggestions on doing that would be great too.