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At the end of the SSD update procedure, both mobile station and base .... of the radio network 100 is explained with respect to a cdma2000 architecture.
Posted by waqasahmad
In case a MS fails to authenticate itself in response to Unique Challenge Msg, SSD update request is sent by BS to MS.
BT initiates SSD update request with RANDSSD value in it.
MS uses this RANDSSD value along with the ESN and A Key of the MS to generate new SSD_A_New and SSD_B_New values.At the same time these values are calculated at the BS also. (SSD_A is used for authentication and SSD_B is used for voice encryption).
MS replies with BS Challenge order with a random value called RANDBS(32 bits) on the reverse link. The same RANDBS along with the SSD_A_New is fed to the Auth Signature algo at the MS to generate AUTHBS value of 18 bits.
Auth signature algo is run at the BS as well to get the AUTHBS value.
As soon as the BS receives BS Challenge order, BS compares the AUTHBS value generated at the BS with that received from a MS.
If both the valus matches, BS replies with SSD update confirmation msg or else rejection msg.
After confirmation order, a BS sets new SSD values in the for an authenticated MS
Posted by jahangir1983
In case a MS fails to authenticate itself in response to Unique Challenge Msg, SSD update request is sent by BS to MS.
BT initiates SSD update request with RANDSSD value in it.
MS uses this RANDSSD value along with the ESN and A Key of the MS to generate new SSD_A_New and SSD_B_New values.At the same time these values are calculated at the BS also. (SSD_A is used for authentication and SSD_B is used for voice encryption).
MS replies with BS Challenge order with a random value called RANDBS(32 bits) on the reverse link. The same RANDBS along with the SSD_A_New is fed to the Auth Signature algo at the MS to generate AUTHBS value of 18 bits.
Auth signature algo is run at the BS as well to get the AUTHBS value.
As soon as the BS receives BS Challenge order, BS compares the AUTHBS value generated at the BS with that received from a MS.
If both the valus matches, BS replies with SSD update confirmation msg or else rejection msg.
After confirmation order, a BS sets new SSD values in the for an authenticated MS
Posted by jahangir1983
In case a MS fails to authenticate itself in response to Unique Challenge Msg, SSD update request is sent by BS to MS.
BT initiates SSD update request with RANDSSD value in it.
MS uses this RANDSSD value along with the ESN and A Key of the MS to generate new SSD_A_New and SSD_B_New values.At the same time these values are calculated at the BS also. (SSD_A is used for authentication and SSD_B is used for voice encryption).
MS replies with BS Challenge order with a random value called RANDBS(32 bits) on the reverse link. The same RANDBS along with the SSD_A_New is fed to the Auth Signature algo at the MS to generate AUTHBS value of 18 bits.
Auth signature algo is run at the BS as well to get the AUTHBS value.
As soon as the BS receives BS Challenge order, BS compares the AUTHBS value generated at the BS with that received from a MS.
If both the valus matches, BS replies with SSD update confirmation msg or else rejection msg.
After confirmation order, a BS sets new SSD values in the for an authenticated MS
Posted by jahangir1983
In case a MS fails to authenticate itself in response to Unique Challenge Msg, SSD update request is sent by BS to MS.
BT initiates SSD update request with RANDSSD value in it.
MS uses this RANDSSD value along with the ESN and A Key of the MS to generate new SSD_A_New and SSD_B_New values.At the same time these values are calculated at the BS also. (SSD_A is used for authentication and SSD_B is used for voice encryption).
MS replies with BS Challenge order with a random value called RANDBS(32 bits) on the reverse link. The same RANDBS along with the SSD_A_New is fed to the Auth Signature algo at the MS to generate AUTHBS value of 18 bits.
Auth signature algo is run at the BS as well to get the AUTHBS value.
As soon as the BS receives BS Challenge order, BS compares the AUTHBS value generated at the BS with that received from a MS.
If both the valus matches, BS replies with SSD update confirmation msg or else rejection msg.
After confirmation order, a BS sets new SSD values in the for an authenticated MS.
Posted by kparikh
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