| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| encoding/pem | Package pem implements the PEM data encoding, which originated in Privacy Enhanced Mail. |
| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/golang/glog | Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup. |
| github.com/google/trillian | Package trillian contains the generated protobuf code for the Trillian API. |
| github.com/google/trillian/client/rpcflags | Package rpcflags defines flags for configuring RPC clients. |
| google.golang.org/grpc | Package grpc implements an RPC system called gRPC. |