TY - JOUR
T1 - Modifying YCN key assignment scheme to resist the attack from Hwang
AU - Yeh, Jyh Haw
AU - Scheepers, Marion
AU - Hu, Wen Chen
PY - 2005/8/31
Y1 - 2005/8/31
N2 - A modified YCN cryptographic key assignment scheme for resistance against the attack from Hwang is discussed. Hwang's attack is a collusive attack where a set of classes H = {C1, C2,..., Cn} collusively derive another class Cl's key, but none of the classes in H is allowed to access Cl. It is found that the YCN scheme is not only secure against Hwang's attack but become more efficient on assigning the prime numbers. A method to protect another possible attack, tansitive key-derivation, is also discussed.
AB - A modified YCN cryptographic key assignment scheme for resistance against the attack from Hwang is discussed. Hwang's attack is a collusive attack where a set of classes H = {C1, C2,..., Cn} collusively derive another class Cl's key, but none of the classes in H is allowed to access Cl. It is found that the YCN scheme is not only secure against Hwang's attack but become more efficient on assigning the prime numbers. A method to protect another possible attack, tansitive key-derivation, is also discussed.
KW - Cryptography
KW - Data access control
KW - Hierarchy with exceptions
UR - http://www.scopus.com/inward/record.url?scp=21344440567&partnerID=8YFLogxK
U2 - 10.1016/j.ipl.2005.05.008
DO - 10.1016/j.ipl.2005.05.008
M3 - Article
AN - SCOPUS:21344440567
SN - 0020-0190
VL - 95
SP - 435
EP - 440
JO - Information Processing Letters
JF - Information Processing Letters
IS - 4
ER -