85results about How to "Easy to decrypt" patented technology

A system and method for facilitating BIOS integrated encryption is provided. An interface is defined between the operating system and the BIOS. The operating system employs this interface to provide BIOS code information to facilitate decryption of data that is encrypted on the system. In the pre-operating system boot phase, the BIOS employs the decryption information provided from this interface in order to decrypt the data. The decrypted information can be employed to facilitate secure rebooting of a computer system from hibernate mode and / or secure access to device(s).

An image signal output device includes a code generating means for generating a two-dimensional geometrical code based on a source data, a obtaining means for retrieving a sequential image signal, a code inserting means for inserting the two-dimensional geometrical code in the sequential image signal and a output means for outputting the sequential image signal. The code inserting means imperceptibly inserts the two-dimensional geometrical code in the sequential image signal, and the output means outputs the sequential image signal having the two-dimensional geometrical code inserted therein. The imperceptible two-dimensional geometrical code is captured by a camera in a cell phone to be decoded and stored in a memory medium.

In a contents data transmission / reception system, a contents data transmitter generates a plurality of key information, encrypts contents data by using one of the key information, transmits the key information through a plurality of signal routes to a contents data receiver, and then, transmits the encrypted contents data used by the key information through the signal routes to the contents data receiver. The contents data receiver receives the key information and the encrypted contents data transmitted from the contents data transmitter through the signal routes, and decrypts the encrypted contents data by using the key information.

The invention is a method that the digital image can be encrypted in block parts and eliminated the visible watermarks. Every pixels of 2-value watermark image will be corresponded to the pixels nub of 4 * 4 size in the vector gray image, and encryption is made to a part of pixels in the block corresponding to black pixels to get the image with translucent watermark. The embedding and the resuming sides possess the same key or key generator. The sender embeds the 2-value digital watermark image into the vector translucently on the base of key, which can be the image of scenery taken by digital camera, CT or magnetic resonance, satellite remote sensing and et al, and discloses the image with digital watermark. When getting it, the resuming side can remove the 2-value digital watermark image to renew the former one by the same key.

The invention discloses a key negotiation method applied to a power distribution main station of a distribution automatic system, which can obtain the identity label and random number of the power distribution terminal after the two-way identity authentication is completed, and generates a working key according to the identity label, the random number and the root key and sends a control instruction encrypted with the working key to the power distribution terminal, so that the power distribution terminal decrypts the control instruction and returns response information to complete key negotiation. It can be seen that the working key in the present invention is generated according to the identity label and the random number; in different session processes, the random number is different, sothe working key is also different and is not easy for the illegal personnel to crack, thereby greatly improving the safety of the distribution automatic system. Correspondingly, the present inventionalso provides a key negotiation device, a key negotiation method and device applied to the power distribution terminal, and a power distribution automatic system, the functions of which correspond tothe functions of the aforementioned method.

The invention relates to the field of digital work copyright protection, in particular to a technique in which a multi-computing apparatus uses a digital work upon authorization, and more particular to a digital permit transmitting system, a computing apparatus and a digital work decryption operating method. The method comprises the following steps: the computing apparatus obtains a digital permit of the digital work; the digital permit is generated according to characteristic information of an authorization apparatus set and a decryption key of the digital work; and the computing apparatus obtains an apparatus identifier of the present computing apparatus, restores the decryption key according to the digital permit and the apparatus identifier of the present computing apparatus, and operates the digital work after decrypting the digital work by using the decryption key. Due to the convenient reduplication of the digital permit, the authorized computing apparatus can conveniently obtain the digital permit and conveniently utilizing the apparatus identifier of the present computing apparatus and the digital permit to obtain the decryption key so as to decrypt and operate the digital work.

In one embodiment, a communication device includes a key strength controlling agent 308 operable to (i) receive a request for a cryptographic key; (ii) determine, from a restriction identifier, whether the cryptographic key strength is restricted; (iii) when the cryptographic key is restricted, cause the use of a second cryptographic key having a second key strength; and (iv) when the cryptographic key is not restricted, cause the use of a first cryptographic key having a first key strength. The first and second key strengths are different.

The invention discloses a data encryption and decryption method and device, computing equipment and a storage medium, and the method comprises the steps: receiving a data encryption storage request and / or a data encryption transmission request, submitted by a first user, for to-be-processed original data; in response to the request, randomly generating a data key, and encrypting the original databy using the data key to obtain first encrypted data; querying a target public key of a second user, and encrypting the data key by using the target public key to obtain a key ciphertext correspondingto the second user; and combining the key ciphertext with the first encrypted data to generate second encrypted data, and storing the second encrypted data and / or transmitting the second encrypted data to a second user. According to the scheme, data storage and / or data transmission can be conveniently completed in an encryption mode, the second user can also conveniently decrypt the encrypted data, and the plaintext of the data key is not stored and / or transmitted, so that the data security is effectively improved.

The invention discloses an approval signature verifying method, a mobile device, a terminal device and a system and belongs to the technical field of communication. The method comprises the following steps: the terminal device is used for encrypting approval information via anyone of an approver gesture information, a first hand-written signature, first voiceprint information and first fingerprint information which are pre-stored; the mobile terminal obtains decryption information input via an approver, encrypted approval information is decrypted according to the decryption information, the mobile terminal obtains an approver-input signature on the approval information and verifies the signature after the approval information is successfully decrypted, and successful verification information is sent to the terminal device after the signature is successfully verified. The decryption information is obtained via the mobile device, the signature on the approval information is obtained, the approver can complete approval procedures via the mobile device, approving efficiency is improved, a problem that waiting is caused due to failure to complete the approval procedures timely when the approver is on a business trip or cannot have convenient access to the terminal device, and user experience is improved.

The invention discloses a data encryption method. The method includes steps of acquiring a user key preset in a security chip and valid data bits in the user key when to-be-encrypted data is detected; determining an embedding rule for embedding the valid data bits in the to-be-encrypted data according to the structure attribute of the user key or a received customized instruction; embedding the valid data bits in corresponding positions of a data bit sequence of the to-be-encrypted data according to the embedding rule; using the embedded positions of the valid data bits as check data, and loading the check data onto the data sequence in which the valid data bits are embedded in order to generate encrypted data. The invention also discloses a security chip and a computer readable storage medium. The data encryption method can increase the cracking difficulty of encrypted data.

The invention provides an embedded device firmware security upgrading method and system, a terminal and a storage medium, and the embedded device firmware security upgrading method comprises the steps: setting an encryption algorithm library, and storing a plurality of encryption algorithms in the encryption algorithm library; randomly selecting an encryption algorithm from the encryption algorithm library as a primary encryption algorithm to perform primary encryption on an upgrade file, and encoding and packaging the primary encryption file and the primary encryption algorithm into a temporary file; randomly selecting an encryption algorithm from the encryption algorithm library as a secondary encryption algorithm to encrypt the temporary file, and encoding and packaging the encrypted file and the secondary encryption algorithm into an encrypted upgrade file; and sending the encrypted upgrading file to a terminal to which embedded equipment to be upgraded belongs, wherein the encrypted upgrading file is decrypted and decompressed by the terminal and then burnt to the embedded equipment to be upgraded. According to the embedded device firmware security upgrading method and system,the security of the firmware upgrading file can be improved, so that the security upgrading of the firmware of the embedded equipment is realized.