File access security method and means

Details File access security method and means File access security method and means

1983-03-07

1986-05-13

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

235382, 34082534, 178 2208, 178 2209, H04Q 900, H04L 900

Patent

active

045889910

ABSTRACT:
An improved file access security technique and associated apparatus accesses data which is stored in encrypted form under one encryption key and re-stores the data re-encrypted under another encryption key, and produces a record of each access and data re-encryption both as the control source of encryption keys for access and re-entry of encrypted data and as a secured audit record of users that had access to each file.

REFERENCES:
patent: 4326098 (1982-04-01), Bouricius et al.
patent: 4423287 (1983-12-01), Zeidler

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