The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 1998
Filed:
Mar. 21, 1996
Shafi Goldwasser, Cambridge, MA (US);
Mihir Bellare, San Diego, CA (US);
Other;
Abstract
Methods for designing encryption algorithms with different levels of security for different parties: 'easier' (but requiring some work nonetheless) to break for some parties (e.g., the government) than for other parties (the adversaries at large). This is achieved by a new form of key escrow in which the government gets some information related to the secret keys of individuals but not the secret keys themselves. The information given to the government enables it to decrypt with a predetermined level of computational difficulty less than that for adversaries at large. The new key escrow methods are verifiable. Verification information can be provided to the government so that it can verify that the information escrowed is sufficient to enable it to decrypt with the predetermined level of computational difficulty. The fact that the government must perform some computation to break the encryption schemes of individual users provides a serious deterrent against massive wiretapping.