| 摘要 |
Disclosed herein are systems, method and computer readable medium for providing authentication of an entity B by an entity A. In the method, entity A selects a value p, a range [a, b] and a granularity epsilon. Entity A sends p, [a, b], and epsilon to entity B. Entity B initializes a value yB=0 and for each x in {a, a+epsilon, . . . , b−epsilon, b} and computes z=E(x)*x. The function E(x) is an encryption scheme and the multiplication is carried out mod p. Entity B updates yB=yB+z. After processing each x, entity B sends yB to entity A. Entity A performs the same calculation and generates a yA value and compares yA with yB. If yB=yA, Entity A authenticate entity B. In one aspect, a light HMAC scheme splits an input x into n blocks with key expansion. |
