Installing R from CRAN Ubuntu repository: No Public Key Error

Question

I am on R version 2.13 and would like to update to a newer version in order to use some packages that depend on R>= 2.14.

I have the line to my sources.list file as

Answer 1

This solved my problem

$ wget -q -O - https://archive.kali.org/archive-key.asc | apt-key add