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A-Key Calculator
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Version
1.0
This program is a useful tool for cellular phone
industry, TDMA and CDMA network engineers and security
managers, as well as everyone who is involved in
developing and testing the TDMA and CDMA handsets with
the built-in authentication function based on the CAVE
algorithm as defined in IS-54 (Appendix A), TSB50,
TSB51, IS-95, IS-136 and TIA-627 standards.
Now everyone can create a valid authentication key (A-
Key), 0 to 20 digits long, with an accompanying 6
digit cheksum calculated for any given ESN number. The
generated sequence of digits can be entered from the
phone's keypad to reprogram the phone's A-Key for
testing purposes or mobile phone activation. After
entering those digits the phone must display "VALID".
This means that the new A-Key value is accepted.
Otherwise the phone will display "INVALID" which means
that either the last 6 digits of A-Key are not correct
or there is a problem with the phone. With this
program you can also validate an existing A-Key for
any particular ESN number. The ESN can be entered in
decimal or hexadecimal format, you can convert it from
one format to another. A useful option is resolving
the ESN prefix and determining the legitimate phone's
manufacturer. After you have entered enough digits of
the ESN the legitimate manufacturer name will be
displayed automatically.
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