A company transmits source code from its headquarters to a partnered third$-$party contract group via the internet. The network administrator wants to enhance the security of this code while it is in transit. The selected method converts data into a coded format that can only be accessed with a key and password. Which technique is being used in this scenario?

A$.$ Hashing

B$.$ Obfuscation

C$.$ Tokenization

D$.$ Encryption