Personally, I think this movie is the best.

In order to maintain the security of encrypted communication, we perform key exchanges regularly.

They were trading goods through barter.

He is an expert in cryptography and is involved in the development of security systems.

I am interested in investing in cryptocurrency.

Don't forget to renew your commuter pass every month.

I use this regular service every week.

A set date fair is held on the first Sunday of every month.

He works at a major news agency.

We are working on building a new communications network.