Strengthening the authentication protocol

Details Strengthening the authentication protocol Strengthening the authentication protocol

1997-10-27

2000-01-11

Cuchlinski, Jr., William A.

Communications: electrical

Continuously variable indicating

With meter reading

34082531, 380 3, 380 23, 455410, 455411, H04L 900, H04B 700

Patent

active

060140852

ABSTRACT:
The invention strengthens authentication protocols by making it more difficult for handset impersonators to gain system access using replay attacks. This goal is accomplished using challenge codes as a parameter for determining authentication codes, whereby different challenge codes cause different authentication codes to be generated. In one embodiment, the challenge codes are functions of challenge types (e.g., global or unique challenges) and/or handset states (e.g., call origination, page response, registration, idle, and SSD-A update). This embodiment prevents handset impersonators from successfully utilizing replay attacks to impersonate a legitimate handset if the legitimate handset is in a different state than the handset impersonator, or if the legitimate handset is responding to a different challenge type than the handset impersonator.

REFERENCES:
patent: 5091942 (1992-02-01), Dent
patent: 5448760 (1995-09-01), Frederick
patent: 5481611 (1996-01-01), Owens et al.
S. Patel, "Weakness of North American Wireless Authentication Protocol," IEEE Personal Communications, vol. 4, No. 3, Jun. 1997, pp. 40-44, XP000655315.

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