Eavesdropping and Unauthorized Use are Impossible with DECT : Privacy and Authentication

Network Side

PP

Radio Path

FP

VLR

HLR

ID

RS, RAND_F

RES

A11

A12

K

RS

KS

RAND_F

Ciphertext

Authentication

Privacy

Encryption Key

RS, RAND_F, RES, KS

RS, KS

K

ƒþ

• easy

• security problem

• VLR : A11, A12

ğ

ƒý

• similar as GSM

• VLR does not

know K

• VLR : No need of

A11 and A12

• VLR choose

RAND_F

• RS and KS can

be reused

• VLR : A12

• Traffic between HLR

and VLR can be reduced

«e¤@±i§ë¼v¤ù

¤U¤@±i§ë¼v¤ù

¦^¨ì²Ä¤@±i§ë¼v¤ù

À˵ø¹Ï§Îª©¥»