Media objects are transformed into active, connected objects via identifiers embedded into them or their containers. In the context of a user's playback experience, a decoding process extracts the identifier from a media object and possibly additional context information and forwards it to a server. The server, in turn, maps the identifier to an action, such as returning metadata, re-directing the request to one or more other servers, requesting information from another server to identify the media object, etc. The linking process applies to broadcast objects as well as objects transmitted over networks in streaming and compressed file formats.

Connected audio and other media objects

Disclosed herein are methods and systems for encoding digital watermarks into content signals. Also disclosed are systems and methods for detecting and/or verifying digital watermarks in content signals. According to one embodiment, a system for encoding of digital watermark information includes: a window identifier for identifying a sample window in the signal; an interval calculator for determining a quantization interval of the sample window; and a sampler for normalizing the sample window to provide normalized samples. According to another embodiment, a system for pre-analyzing a digital signal for encoding at least one digital watermark using a digital filter is disclosed. According to another embodiment, a method for pre-analyzing a digital signal for encoding digital watermarks comprises: (1) providing a digital signal; (2) providing a digital filter to be applied to the digital signal; and (3) identifying an area of the digital signal that will be affected by the digital filter based on at least one measurable difference between the digital signal and a counterpart of the digital signal selected from the group consisting of the digital signal as transmitted, the digital signal as stored in a medium, and the digital signal as played backed. According to another embodiment, a method for encoding a watermark in a content signal includes the steps of (1) splitting a watermark bit stream; and (2) encoding at least half of the watermark bit stream in the content signal using inverted instances of the watermark bit stream. Other methods and systems for encoding/decoding digital watermarks are also disclosed.

Optimization methods for the insertion, protection, and detection of digital watermarks in digitized data

The disclosure describes a method of connecting multimedia content to a network resource. This method operates in a computer network environment. Operating in a network connected device, the method extracts an identifier from a media signal, such as from a digital watermark, perceptual hash, or other machine extracted signal identifier. It then sends the identifier to a network along with context information indicating device type information. From the network, the method receives related data associated with the media signal via the identifier. The related data is adapted to the network connected device based on the device type information. This device type information may include a display type, so that the related date may be formatted for rendering on the display type of the device. This device type information may also include a connection speed so that the related data may be optimized for the connection speed of the device.

Content sensitive connected content

A steganographic embedder associates data with a media signal by encoding the data, a link to the data, or a combination of both into the media signal. The embedder may be located in a media signal capture device or an external process or device (Fig. 2, 100). In one application, for example, an embedder process steganographically encodes data into a media signal as part of the process of uploading the media signal from the media signal capture device to an external device (Fig. 2, 106). In another applications, a media signal capture device includes a steganographic embedder that encodes data or a link to external metadata into the media signal at the time of recording (Fig. 3).

Authenticating metadata and embedding metadata in watermarks of media signals

Systems and methods are described for obtaining and acting upon information indicative of circulatory health and related phenomena in human beings or other subjects.

Circulatory monitoring systems and methods

This invention provides a method for identifying a purchaser who purchased content from which an illegal copy was produced. A provider system encrypts a content purchased by the purchaser using a public key of a purchaser system and sends the encrypted content to the purchaser system. The purchaser system creates a digital signature of the content with the use of a private key of its own and embeds the created digital signature into the received content. When an illegal copy is found, the provider system verifies the digital signature, embedded in the illegal copy as a digital watermark, to identify the purchaser who purchased the content from which the illegal copy was produced.

Digital data authentication method

A mark management server for certifying digital data based on a digital mark to enable realization of identity authentication and data certification when the digital data is transmitted or received on a network. The server includes a mark management processor for receiving a mark registration request demanding a new registration or updating of the mark from a mark terminal device, embedding identity authentication information obtained by encrypting information for identity authentication of a request originator with use of a cryptograph key in a mark design of the request originator to create a mark, and distributing the created mark to the request originator together with a decoding key for decoding of the identity authentication information attached thereto, and a mark decoding key management processor for registering the decoding key for decoding of the encrypted identity authentication information in a mark decoding key management DB and transmitting the registered decoding key to the associated mark terminal device.

Digital signature or electronic seal authentication system and recognized mark management program

According to the present invention, techniques, including a method and system, for restoring and/or validating data and/or associated signature log entries are provided. One embodiment of the present invention provides a method for validating a restored message, having an entry generated in a signature log for a message, where the entry includes cryptographic information associated with the message; Next, when said message is lost, the restored message is generated responsive to a request; and the restored message is validated using the signature log. In another embodiment a method for validating a selected log entry by using a signature log having a plurality of recorded log entries is provided. The method includes: computing a cryptographic value for the selected log entry; and determining if the cryptographic value is part of another recorded log entry.

Method and system for recovering the validity of cryptographically signed digital data

The present invention relates generally to security measures for protecting information on a network and more particularly to detecting falsifications made in the contents of websites on the Internet. In an embodiment of the present invention a method of detecting the falsification of contents of a plurality of files is provided. The method includes producing first falsification-detecting information corresponding to current filenames or current contents of the plurality of files; and detecting the falsification of the contents of the plurality of files by comparing second falsification-detecting information corresponding to the filenames or contents of the plurality of files at the time of registration or renewal with the first falsification-detecting information.

Method of detecting changed contents

Techniques of improving the safety of an information processing system (1001) at low cost are provided, the information processing system having an OS provided with an access control function based upon discretionary access control for preventing illegal accesses to files. A method and apparatus for providing the information processing system with functions and areas (1007) usable only by a specific user different from a system administrator. The areas are provided with an access control function in order to prevent the access control function from being tampered.

Hisashi Toyoshima

Papers

Digital data authentication method

Digital signature or electronic seal authentication system and recognized mark management program

Method and system for recovering the validity of cryptographically signed digital data

Method of detecting changed contents

Trusted computer system