International Business Machines Corporation

Werner Schollenberger

Michael Baessler

Daniel Pittner

Thomas A P Hampp-Bahnmueller

Philipp Hoffmann

Juergen Maletz

Jochen F Doerre

Markus Lorch

Dirk Seider

A computer processor may extract identity information from a document. The identity information may include at least one custodian identity attribute. After extracting the identity information, the computer processor may determine that the identity information is associated with a specific custodian. The computer processor may then search for the custodian identity attribute in a custodian directory to determine whether the custodian directory contains an entry for the custodian. If the custodian is not in the custodian directory, the computer processor may create a new entry in the custodian directory for the custodian and store the extracted identity information in the new entry.

Maintaining a custodian directory by analyzing documents

Providing an encrypted search index for performing searches on encrypted documents, the method comprising: (i) providing a set of documents, the documents comprising a plurality of unencrypted phrases; (ii) providing a master key; (iii) providing, based on the master key, for each phrase a set of encryption keys comprising one or more encryption keys; (iv) selecting, for each phrase, one encryption key of the set of encryption keys; (v) encrypting each phrase with the selected encryption key; and (vi) building an index based on the encrypted phrases, the index comprising information regarding which encrypted phrase is comprised within a certain document.

Providing secure indexes for searching encrypted data

A computer manages methods for determining accurate document transformation by rendering the source document into a non-rasterized format, where the non-rasterized format is a rendered source document. The computer rendering the target document into a non-rasterized format, where the non-rasterized format is a rendered target document. The computer comparing one or more aspects of the rendered source document to corresponding one or more aspects of the rendered target document. The computer determining, based, at least in part, on the compared one or more aspects, whether or not the source document was accurately transformed to the target document.

Verification of transformed content

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Holzgerlingen, Germany

Werner Schollenberger