Metro Automatic fare collection.. 3DES or AES which is more secure?

iloveidentium4There is a need to encrypt financial data when it is transacted over air using AFC systems typically used in contact less card based AFC systems. 3DES and AES systems are deployed in various countries and in India too. AES has better security over 3DES and is more versatile.

The chips used to build the cards and the readers deployed to provide access and transact at entry exit gates should have capability to identify both AES and 3DES based cards.

When specifying and deciding on futuristic and vendor agnostic systems it is preferable to opt for capable systems which identify both versions.