Adobe, Inc.

Philip Levy

Marc Thomas Kaufman

Isak Tenenboym

John Landwehr

Naoki Hada

Jeff Young

James C King

Richard J Cohn

Paul C Anderson

Matthew B Kane

Abhishek Shrivastava

Various embodiments include one or more of systems, methods, software, and data structures for validating a digital signature, wherein common information in a certification chain is maintained in one entry of a Document Secure Store (DSS). The DSS separates the Long Term Validation (LTV) information from the digital signature, allowing amendment of and addition to the LTV information in the DSS after a digital signature is applied to a document.

Methods and apparatus for validating a digital signature

Methods and apparatus, including computer program products, to assemble a collection of documents according to a document list. The document list represents documents to be included in the collection, and includes multiple entries that identify document templates. Each document template includes instructions that a web server can execute to generate a web document based on one or more parameters. A web document corresponding to each of the multiple entries is requested; the requested web documents are received and stored in the collection of documents. Links in the received web documents can be identified and updated. The collection of documents can be accessed as part of a web site.

Using document templates to assemble a collection of documents

Systems and methods are presented for distributed validation of a digitally signed electronic document. A computing device accesses both a representation of the electronic document and a digital signature for the electronic document that includes a digest generated by the digital signature's creator by applying a one-way function to the electronic document. The computing device applies the same one-way function to the accessed representation of the electronic document to generate a new digest, and includes both the digital signature and the new digest in a request sent to a separate validation server. The request does not include the electronic document. The validation server generates validation results that depend on comparing the digest from the digital signature with the new digest, and that do not depend on having the electronic document available to the validation server. The computing device receives the validation results from the separate validation server.

Distributed validation of digitally signed electronic documents

A method and apparatus are presented to perform a distributive computation of a digital signature in a document signing process. A signing request from a remote device initiates the document signing process including the distributive computation. The server verifies digital certificates corresponding to a signer's public key. An encryption request including a set of authenticated attributes and a hash value based on the to-be-signed content is transmitted to the remote device. A signer at the remote device encrypts the hash value in the encryption request with an encryption process utilizing a private key. The resulting encrypted hash value is transmitted to the server to produce the digital signature used to sign the subject content. This distributive computation process minimizes the amount of data transmitted between devices, while minimizing remote device resource requirements, and maintains the integrity of the signer's private key during generation of the digital signature.

Distributive computation of a digital signature

Long-Term Validation (LTV) of a digital signature status indicator is disclosed. In some embodiments, the Long-Term Validation of a digital signature status indicator includes automatically determining whether a digital signature of a digitally signed document is LTV enabled based at least in part on LTV information; and generating an LTV status indicator that displays whether the digital signature of the digitally signed document is LTV enabled.

Long-term validation of a digital signature status indicator

In one embodiment, a method comprising selecting a first node included in a data structure, the data structure representing, in a node-and-link representation, a first portion of electronic content, the data structure including a first external link being associated with the first node, the first external link referencing a first serialization, the first serialization representing a second portion of electronic content in a representation differing from the node-and-link representation of the data structure, augmenting the data structure using the first serialization comprising constructing a set of new nodes, the set of new nodes including all nodes constructible from the serialization, selecting a target node from among the set of new nodes, inserting the target node into the data structure, and inserting a first inter-node link into the data structure, the first inter-node link connecting the first node and the target node, the first inter-node link corresponding to the first external link.

Secondary lazy-accessible serialization of electronic content

In one embodiment, a method comprising accessing a first data object and a second data object of a data structure representing electronic content, the second data object being associated with the first data object, selecting, based on first content included in the first data object, a grammar rule included in a grammar, the grammar rule including a grammar rule item, and based on second content included in the second data object, selecting the grammar rule item included in the grammar rule, and based on the second content and the grammar rule item, generating a portion of a textual representation of the electronic content.

Context-free grammar

Various embodiments described herein provide systems, methods, software, and data structures that allow a page description language reader application, such as ADOBE&#xae; ACROBAT&#xae;, to provide a view of the assets compressed within a compressed archive. These and other embodiments including applications that may interleave one or more compressed archives within a page description language file, such as a PDF file. This interleaving leverages properties of both compressed archive files and page description language files to insert object markers around compressed assets within the compressed archives and references to at least some of the object markers in an index portion of the page description language files. As a result, compressed assets of compressed archives included in a page description language file package may be viewed within the listing of assets of the page description language file. These and other embodiments are described in greater detail below.

Interleaving compressed archives within a page description language file

In an example embodiment, a method comprising accessing a relationship definition associated with a package of data items, the relationship definition including a template string and a first pattern string including a first wildcard symbol, accessing a main file name of a main file, matching the main file name to the first pattern string including associating the first wildcard symbol with a substring of the main file name, and deriving a second pattern string from the template string.

Pattern-based file relationship inference

Embodiments for caching database information are disclosed. A query may specify a set of information to be retrieved from a database file. The database file may be parsed according to the query to retrieve the set of information. The query and the corresponding set of information retrieved from the database file may be stored in a cache file. The cache file may be searched for the query, which may enable the set of information to be retrieved from the cache file. Searching the cache file and retrieving the set of information from the cache file may be faster than searching the database file to retrieve the set of information. The cache file may be associated with a currency token which may indicate whether the cache file is current. The currency token may indicate whether the database file has been updated since being parsed according to the query.

Caching database information

Displaying ordered items is disclosed. Ordered items are analyzed to determine at least one set of groupable items. The groupable items are combined into a group. Group order associated with the group is determined. The group, along with an indicia of the group order, is displayed. The group can be reordered to modify the order of the items.

Technique for analyzing and graphically displaying document order

Various embodiments described herein provide systems, methods, software, and data structures that allow a page description language reader application, such as Adobe&#xae; Acrobat&#xae;, to provide a view of the assets compressed within a compressed archive. These and other embodiments including applications that may interleave one or more compressed archives within a page description language file, such as a PDF file. This interleaving leverages properties of both compressed archive files and page description language files to insert object markers around compressed assets within the compressed archives and references to at least some of the object markers in an index portion of the page description language files. As a result, compressed assets of compressed archives included in a page description language file package may be viewed within the listing of assets of the page description language file. These and other embodiments are described in greater detail below.

Growing community of inventors

Los Altos, CA, United States of America

Philip Levy