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What are secure channel keys in java card used to do?
Posted: Tue Dec 08, 2015 1:30 am
by GraceGIRL
As I found by google, ENC stands for Encryption, MAC stands for Message Authentication Code and DEK stands for Data Encryption Key.
I want to know when these three secure channel keys are used. What are they used to do? Are all these keys used in every communication step?
Re: What are secure channel keys in java card used to do?
Posted: Mon Dec 21, 2015 1:53 am
by mabel
GraceGIRL wrote:As I found by google, ENC stands for Encryption, MAC stands for Message Authentication Code and DEK stands for Data Encryption Key.
I want to know when these three secure channel keys are used. What are they used to do? Are all these keys used in every communication step?
Here are part of description about the three GP keys in GP2.1.1:
A Security Domain, including the Issuer Security Domain shall have at least one key set containing 3 keys to be
used in the initiation and use of a Secure Channel. These keys are all double length DES keys and are the
following:
• The Secure Channel encryption key (S-ENC) and the Secure Channel MAC key (S-MAC). These keys
are only used to generate Secure Channel session keys during the initiation of a Secure Channel.
• The data encryption key (DEK) for decrypting sensitive data, e.g. secret or private keys. This key is a
double length DES key and is used as a static key.