Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1987-01-20
1989-09-12
Buczinski, Stephen C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
375 1, 375 9, 375 45, 375 65, H04K 100, H04B 1500, H04L 2710
Patent
active
048667714
ABSTRACT:
Periodic components of a data signal are generated from a periodic original signal in a manner to cause the periodic components to represent not only the data but also information about characteristics of the original signal; subsequently both the data and the information about the original signal characteristics are derived from the periodic components. The periodic components of a data signal are generated at frequencies within a frequency band and in a manner such that the components precisely define a fixed frequency outside the spectral band. Unauthorized access to a device (of the kind that receives data in the form of a data signal having periodic components) is detected by generating the periodic components using a modulation scheme, involving no encryption, whereby the data may be recovered from the data signal directly by demodulation even by an unauthorized party; imparting inherent authentication information to the periodic components; and permitting authorized access and detecting unauthorized access on the basis of the inherent authentication information.
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Mashbits et al. "FSK Signaling Generation Using a Reference Oscillator with Fixed Parameters" Telecommunications, vol. 24, No. 8, 1970, pp. 7-12.
Buczinski Stephen C.
The Analytic Sciences Corporation
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