Methods, systems, and devices that support determining whether media data has been altered are described. Captured media data may be segmented into one or more subsets, and cryptographic representations (e.g., hashes) based on the subsets may be written to an immutable ledger, possibly along with metadata and other related data. A block of a blockchain may be created for each entry in the immutable ledger. A set of media data may be validated, if a corresponding immutable ledger exists, based on segmenting the set of media data into one or more subsets in accordance with the segmenting upon capture, creating candidate cryptographic representations (e.g., hashes) based on the subsets, and comparing the candidate cryptographic representations with contents of the corresponding immutable ledger.

A method for generating debuggable obfuscated script includes embedding into a Web page, a query to a data store of a client for a key disposed within fixed storage of the client, further embedding into the Web page both an encrypted network reference to an un-obfuscated, clear form of a script, the encrypted network reference being decryptable with the key, and also an un-encrypted reference to an obfuscated form of the script and yet further embedding into the Web page, a selection directive selecting and decrypting the encrypted network reference to retrieve the un-obfuscated form upon loading the Web page on the condition that the key is found in the fixed storage, but otherwise selecting the un-encrypted reference to retrieve the obfuscated form. The method additionally includes serving the Web page to the client.

Methods, systems, and devices that support determining whether media data has been altered are described. Captured media data may be segmented into one or more subsets, and cryptographic representations (e.g., hashes) based on the subsets may be written to an immutable ledger, possibly along with metadata and other related data. A block of a blockchain may be created for each entry in the immutable ledger. A set of media data may be validated, if a corresponding immutable ledger exists, based on segmenting the set of media data into one or more subsets in accordance with the segmenting upon capture, creating candidate cryptographic representations (e.g., hashes) based on the subsets, and comparing the candidate cryptographic representations with contents of the corresponding immutable ledger.

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for hiding copyright information in a display screen. One of the methods includes generating, by a computing device, a unique identifier (ID) based on copyright information associated with a digital content, wherein the copyright information and the digital content are recorded on a blockchain of a blockchain network; determining one or more attributes associated with the display screen; and converting the unique ID to a digital watermark based on the one or more attributes, the digital watermark not being apparent to an unaided human eye when displayed in the display screen and enables retrieval of the copyright information from the blockchain based on the unique ID.

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for embedding copyright information in one or more pages for presenting digital content. One of the methods includes generating, by a computing device, a unique identifier (ID) based on copyright information associated with the digital content; identifying one or more attributes associated with a page design of one or more blank pages of an electronic file; embedding the unique ID in the one or more blank pages by changing the one or more attributes to be representative of the unique ID; allocating the digital content to at least one of the one or more information-embedded pages; and distributing, by the computing device, the one or more information-embedded pages allocated with the digital content to the blockchain network.

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for embedding copyright information in one or more pages for presenting digital content. One of the methods includes generating, by a computing device, a unique identifier (ID) based on copyright information associated with the digital content; identifying one or more attributes associated with a page design of one or more blank pages of an electronic file; embedding the unique ID in the one or more blank pages by changing the one or more attributes to be representative of the unique ID; allocating the digital content to at least one of the one or more information-embedded pages; and distributing, by the computing device, the one or more information-embedded pages allocated with the digital content to the blockchain network.

Methods that can protect sensitive data are provided. One method includes determining, by a processor, whether a user is focusing on an obscured set of sensitive data displayed on a computing device, clarifying the obscurity of a portion of the displayed set of sensitive data in response to determining that the user focusing on the portion of the displayed set of sensitive data, and maintaining the obscurity of one or more other portions of the displayed set of sensitive data in response to determining that the user not focusing on the one or more other portions of the displayed set of sensitive data. Apparatus and computer program products that can include, perform, and/or implement the methods are also provided.

Disclosed are an electronic device for obfuscating user data and a server for decoding the same. A method for controlling an electronic device according to the present disclosure comprises the steps of: acquiring a security parameter according to data transmitted to an external server; applying an obfuscation algorithm to the data by using the security parameter; and transmitting the data, to which the obfuscation algorithm has been applied, to the external server. Furthermore, in connection with a method for controlling a system comprising an electronic device for obfuscating data and a server for decoding the same according to the present disclosure, a method for controlling the electronic device comprises the steps of: inserting a fingerprint into data; generating multiple pieces of split data having a preset first size on the basis of the data into which the fingerprint has been inserted; applying an obfuscation algorithm to one piece of split data selected from the multiple pieces of split data by using a preset security parameter; and transmitting the split data, to which the obfuscation algorithm has been applied, to the server. In addition, a method for controlling the server comprises the steps of: receiving the multiple pieces of split data, to which the obfuscation algorithm has been applied, from the electronic device; acquiring at least one piece of candidate data on the basis of the received multiple pieces of split data, to which the obfuscation algorithm has been applied; and acquiring data comprising the fingerprint among the at least one piece of candidate data.

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for hiding copyright information in a display screen. One of the methods includes generating, by a computing device, a unique identifier (ID) based on copyright information associated with a digital content, wherein the copyright information and the digital content are recorded on a blockchain of a blockchain network; determining one or more attributes associated with the display screen; and converting the unique ID to a digital watermark based on the one or more attributes, the digital watermark not being apparent to an unaided human eye when displayed in the display screen and enables retrieval of the copyright information from the blockchain based on the unique ID.

A device, system and method for screening of personally identifiable information is provided. An incident type of a particular incident is determined. Responsive to determining that potential evidence associated with the particular incident includes personally identifiable information, the potential evidence being of a particular evidence type including one or more of media and metadata generated by a user or a device associated with the user, a personally identifiable information processing mode is selected to process the potential evidence as a function of the incident type of the particular incident and an evidence type of the potential evidence. When selected mode is a storing mode, a record of the potential evidence is generated that included the personally identifiable information to be stored in an electronic storage device.