Cryptography – Electric signal modification – Having production of printed copy
Reexamination Certificate
2002-06-21
2008-10-14
Colin, Carl (Department: 2136)
Cryptography
Electric signal modification
Having production of printed copy
C380S037000, C380S046000, C380S055000, C380S056000, C713S170000, C713S194000
Reexamination Certificate
active
07436956
ABSTRACT:
Encryption of documents is used to restrict access to such documents to those users who have the appropriate decryption keys. The encryption of documents on public web servers hitherto has prevented indexing by search engines. By keeping words and possible sentences or paragraphs intact in the encrypted document but re-ordering elements of the document to prevent the document being human-readable, the possibility of encrypted documents being indexed by search engines is provided.
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Colin Carl
Hewlett--Packard Development Company, L.P.
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