110results about How to "Avoid decryption" patented technology

A method for preventing unauthorized recording of media content on a Macintosh operating system. The present method registers a compliance mechanism on a client system having the Macintosh operating system operating thereon. The compliance mechanism comprises a framework for validating the compliance mechanism on the client system, and a multimedia component opened by the framework. The present method uses the multimedia component for decrypting the media content on the client system. The present method also prevents decryption of the media content on the client system having the Macintosh operating system operating thereon if a portion of the compliance mechanism is invalidated.

A storage-medium rental system includes a portable storage medium to be rented to the user, a portable semiconductor memory owned by the user, a rental-shop apparatus owned by the rental agent, and a reproduction apparatus owned by the user. The storage medium prestores encrypted content which is generated by encrypting digital work by using a content encryption key. The semiconductor memory has an area for securely storing a content decryption key. The rental-shop apparatus stores a content decryption key for decrypting the encrypted content. The rental-shop apparatus writes the content decryption key to the semiconductor memory. The reproduction apparatus securely reads the content decryption key from the semiconductor memory, reads the encrypted content from the storage medium, decrypts the encrypted content by using the content decryption key, and reproduces the decrypted content.

The present invention discloses a keypad matrix element shift arrangement method having an efficient an neighboring numeral traffic line customarily. According to the present invention, an information input apparatus whose key arrangement varies includes a key display section of a square shape for displaying a key image, and a key input section for receiving information of a corresponding key at a predetermined location of the key image displayed by the key display section. The information input apparatus further an input controller for generating an image of predetermined key arrangement selected among a plurality of key images in which numeric keys are shift-arranged so that there is no crossing in an neighboring numeral traffic line, providing the generated image to the key display section, and converting information inputted through the key input section into an actual key value according to the predetermined key arrangement.

A secure portable storage device includes a control module. When a host sends a first key to the control module with a write command so as to command the control module to write the first key into a redirecting file, the control module stores the first key in a temporary working buffer and verifies whether the first key is valid; when the first key is valid, the control module sends a second key and an encrypted content data to the host for generating a third key by decrypting the second key according to the first key and decrypting the encrypted content data into a content data according to the third key. Moreover, when the host sends multiple read commands to the control module in sequence, the control module verifies whether a sequence of the read commands received is valid and sends the second key and the encrypted content data to the host for an encryption. Related apparatuses, methods and techniques also are provided.

The invention discloses a data encryption method and system. The data encryption method comprises the steps of obtaining a cipher key which is generated according to fingerprint information of a current user when the current user conducts encryption or decryption operation to data; and encrypting or decrypting the data by using the cipher key. Since the fingerprint information of users is different, the cipher keys which are generated according to the fingerprint information are different, i.e. each user owns a unique cipher key and further owns a unique data encryption method. The cipher key is generated according to the fingerprint information through a preset rule in terminal systems. Even though the finger information of the users is illegally copied and stolen, encrypted files in the terminal systems cannot be decrypted in other systems, so that the security of user data is greatly improved.

Provided is an encryption device with enhanced function to prevent an encryption key from being decrypted by consumption current analysis, by complicating alignment of consumption current waveforms. The encryption device comprises a clock control circuit adapted to receive a clock signal and a pseudo-random number, and perform a suspend process and a resume process to the clock signal based on the pseudo-random number to generate an encryption processor clock signal; an encryption processor adapted to perform an encryption process to encryption target data in synchronization with the encryption processor clock signal; and a current control circuit adapted to obtain an arithmetic state showing an operational state of the encryption processor to adjust a consumption current amount based on the arithmetic state.

A method and system for privacy-preserving ridge regression using masks is provided. The method includes the steps of requesting a garbled circuit from a crypto service provider, collecting data from multiple users that has been formatted and encrypted using homomorphic encryption, summing the data that has been formatted and encrypted using homomorphic encryption, applying prepared masks to the summed data, receiving garbled inputs corresponding to prepared mask from the crypto service provider using oblivious transfer, and evaluating the garbled circuit from the crypto service provider using the garbled inputs and masked data.

The invention is suitable for the technical field of computers and provides a data collection method and apparatus, a device and a storage medium. The method comprises the steps of obtaining registration information of a user, wherein the registration information comprises a registration account and a password; according to a preset encryption key, encrypting the password to obtain an encrypted password; receiving a data collection demand of the user, wherein the data collection demand comprises to-be-collected data and collection time; according to the to-be-collected data, determining a collection task and a to-be-connected target database; when the collection time is up, decrypting the encrypted password by using a pre-authorized decryption tool; connecting the target database by usingthe registration account and the decrypted password; and if the target database is connected successfully, executing the collection task to obtain collected target data. According to the technical scheme, the leakage risk of the plaintext password is effectively reduced; illegal users are prevented from decrypting the encrypted password; and the data security is improved.

A computing system includes a first central processing unit (CPU) and a second CPU coupled with the first CPU and with a host processor. In response to a request by the host processor to boot the second CPU, the first CPU is configured to execute secure booting of the second CPU by decrypting encrypted code to generate decrypted code executable by the second CPU but that is inaccessible by the host processor.

Systems and methods are disclosed for establishing secure communications to a group rather than to an individual recipient. The systems and methods presented include mechanisms for encryption to a group, decryption by one or more group members, digital signature generation and verification, and the addition/removal of group members.

The invention relates to the field of electronic book distribution and discloses an electronic book downloading method and a purchasing system. In the invention, a key is generated according to the mark of a reader, thus, an encrypted electronic book can only be decrypted by the appointed reader, thereby protecting the downloaded electronic book from being copied and pirated. Before the decryption of the reader, the mark of the authorized reader is read from the key and compared with the mark per se, and the electronic book is decrypted when both the marks are consistent, thereby preventing the electronic book from being decrypted by the unauthorized reader.

The invention discloses a file encryption method, a file decryption method, a file encryption device and equipment. The method comprises the following steps: obtaining a to-be-encrypted file; generating a secrete key, an offset value and a sampling value; determining the to-be-encrypted field in the to-be-encrypted file according to the offset value and the sampling value; and encrypting the to-be-encrypted field according to the secrete key. According to the invention, the file encryption efficiency can be improved.

A wireless communication system includes an access point 101 and a terminal 102 exchanging, with the access point 101, a packet encrypted with an encryption key that has been previously set on the basis of a Wired Equivalent Privacy (WEP). When receiving the packet, the access point 101 determines whether the received packet includes a Weak Initial Vector (Weak IV) having a specified bit pattern. When the packet includes the Weak IV, the access point 101 transmits a disturbing signal for preventing the packet from being eavesdropped.

The invention relates to a method for hiding mass information by using a remote sensing image and belongs to the field of information hiding in pattern recognition and data encryption of information sciences. The method is characterized in that mass confidential files are stored in a remote sensing image file to have strong concealment; data is only stored in characteristic areas of the image file; and the hidden data is subjected to random encryption in advance and the encryption sites of an encrypted image still reserve the characteristics of an original image, so that the encrypted image has little appearance change to avoid being identified and decrypted and provide a security guarantee for the storage and transmission of private information. In addition, the invention also provides a method for extracting remote sensing image hidden information based on the method for hiding the mass information, which can effectively extract the hidden information and is simple and easy to implement.

A method for securing an electronic document ( 22 ) comprising attaching a biometric characteristic ( 20 ) and the electronic document ( 22 ) to form a biometric characteristic-document combination and encrypting the biometric characteristic-document combination to form an encrypted data package ( 24 ).

A transmitting apparatus transmits encrypted image data created by encrypting image data by using an authentication code as an encryption key and the first converted information created by digesting the authentication code by using a one-way function to an image recording apparatus. The image recording apparatus creates the second converted information by digesting an authentication code received directly from the user by using a one-way function, decrypts the received encrypted image data into image data by using the received authentication code as a decryption key if the created second converted information and the received first converted information coincide, and creates and records an image based on the decrypted image data.

The present invention relates to an information processing device equipped with an encrypting/decrypting unit which encrypts or decrypts data as well as an encryption/decryption enabling/disabling switching unit, which enables the encrypting/decrypting unit to encrypt the file data upon recording such file data in a recording medium, and disables the encrypting/decrypting unit to prevent the deleting data used to overwrite and erase file data from being encrypted when such file data recorded in the recording medium is overwritten and deleted.