If it is, I can use my credentials to bump somebody.

They're simply using your credentials to produce a key which is used with symmetric encryption.

He used his credentials, but it was still a tough job getting through.

These businessmen and journalists used their own credentials as cover.

That evening, after the terrorist attacks, he was able to use his medical credentials to get through the security perimeter and return to their apartment.

"I take it that the man who left this post using your credentials was Roger Brooks, then?"

Use your credentials to sign the application with this shell script.

With that knowledge, it can freely tweet using someone else's credentials.

He used his Chinese nationalist credentials to his advantage to keep himself in power.

At the beginning, he had to use his maize-and-blue credentials just to get in front doors.