摘要:
The present invention provides a computer implemented method, data processing system, and computer program product to restore an encrypted file. A computer receives a command to restore an encrypted file, wherein the encrypted file was previously backed up. The computer identifies a user associated with the encrypted file. The computer looks up a first keystore of the user based on the user, the first keystore having an active private key. The computer determines that a public key of the encrypted file fails to match an active public key of the first keystore. The computer restores a second keystore of the user to form a restored private key, wherein the second keystore was previously backed up. The computer responsive to a determination that the public key of the encrypted file fails to match the active public key of the first keystore, decrypts the encrypted file encryption key based on the restored private key to form a file encryption key. The computer encrypts the file encryption key with the active private key of the first keystore.
摘要:
The present invention provides a computer implemented method, data processing system, and computer program product to restore an encrypted file. A computer receives a command to restore an encrypted file, wherein the encrypted file was previously backed up. The computer identifies a user associated with the encrypted file. The computer looks up a first keystore of the user based on the user, the first keystore having an active private key. The computer determines that a public key of the encrypted file fails to match an active public key of the first keystore. The computer restores a second keystore of the user to form a restored private key, wherein the second keystore was previously backed up. The computer responsive to a determination that the public key of the encrypted file fails to match the active public key of the first keystore, decrypts the encrypted file encryption key based on the restored private key to form a file encryption key. The computer encrypts the file encryption key with the active private key of the first keystore.
摘要:
An encryption apparatus and method for providing an encrypted file system are provided. The encryption apparatus and method of the illustrative embodiments uses a combination of encryption methodologies so as to reduce the amount of decryption and re-encryption that is necessary to a file in the Encrypted File System in the event that the file needs to be modified. The encryption methodologies are interleaved, or alternated, with regard to each block of plaintext. In one illustrative embodiment, Plaintext Block Chaining (PBC) and Cipher Block Chaining (CBC) encryption methodologies are alternated for encrypting a sequence of blocks of data. The encryption of a block of plaintext is dependent upon the plaintext or a cipher generated for the plaintext of a previous block of data in the sequence of blocks of data so that the encryption is more secure than known Electronic Code Book encryption methodologies.
摘要:
An encryption apparatus and method for providing an encrypted file system are provided. The encryption apparatus and method of the illustrative embodiments uses a combination of encryption methodologies so as to reduce the amount of decryption and re-encryption that is necessary to a file in the Encrypted File System in the event that the file needs to be modified. The encryption methodologies are interleaved, or alternated, with regard to each block of plaintext. In one illustrative embodiment, Plaintext Block Chaining (PBC) and Cipher Block Chaining (CBC) encryption methodologies are alternated for encrypting a sequence of blocks of data. The encryption of a block of plaintext is dependent upon the plaintext or a cipher generated for the plaintext of a previous block of data in the sequence of blocks of data so that the encryption is more secure than known Electronic Code Book encryption methodologies.
摘要:
Mechanisms for providing an encrypted file system are provided. The mechanisms use a combination of encryption methodologies so as to reduce the amount of decryption and re-encryption that is necessary to a file in the Encrypted File System in the event that the file needs to be modified. The encryption methodologies are interleaved, or alternated, with regard to each block of plaintext. In one illustrative embodiment, Plaintext Block Chaining (PBC) and Cipher Block Chaining (CBC) encryption methodologies are alternated for encrypting a sequence of blocks of data. The encryption of a block of plaintext is dependent upon the plaintext or a cipher generated for the plaintext of a previous block of data in the sequence of blocks of data so that the encryption is more secure than known Electronic Code Book encryption methodologies.
摘要:
A method, system and computer-readable medium for generating, caching and transmitting textual equivalents of information contained in an audio signal are presented. The method includes generating a textual equivalent of at least a portion of a speech-based audio signal in one device into a textual equivalent, storing a portion of the textual equivalent in first device's memory and transmitting the stored textual equivalent to a another device.
摘要:
To migrate two or more virtual machines in a source hypervisor to a target hypervisor, a list of active and connected virtual machines in the source hypervisor is acquired. Connections between the source virtual machines are rerouted to a buffer so that data flowing between the source virtual machines is captured. The source virtual machines are migrated to a target hypervisor and are connected in the same manner as in the source hypervisor. The buffered data is migrated to the respective migrated virtual machines, and the target virtual machines are activated. The virtual machines can be migrated in order of data flow dependency such that the least dependent virtual machine is migrated first.
摘要:
A mechanism is provided for performance tuning for software as a performance level service. At the request of a customer, a cloud provider may use a performance tuning component to determine performance parameters to increase performance of an application running on a given hardware platform. The cloud provider may then generate a tuning configuration and associate the tuning configuration with the customer such that when the cloud provider deploys a customer's software to a partition in a host system, the cloud provider sends the tuning configuration with the deployment package. The performance tuning component at the host system then applies the performance parameters in the tuning configuration to increase performance.
摘要:
A method, programmed medium and system are provided for sending notice to a website representative whenever a specific and unique website is being accessed by an inquiring party seeking information regarding the website content. Contact information is exchanged between an inquiring party and a website representative and whenever the inquiring party views the unique URL which was provided by the website representative, the website representative is contacted with the inquiring party's phone number in real-time with the information that the inquiring party is now viewing the website.
摘要:
Exemplary methods, systems, and products are described that operate generally by moving subroutine return address protection to the processor itself, in effect proving atomic locks for subroutine return addresses stored in a stack, subject to application control. More particularly, exemplary methods, systems, and products are described that write protect subroutine return addresses by calling a subroutine, including storing in a stack memory address a subroutine return address and locking, by a computer processor, the stack memory address against write access. Calling a subroutine may include receiving in the computer processor an instruction to lock the stack memory address. Locking the stack memory address may be carried out by storing the stack memory address in a protected memory lockword. A protected memory lockword may be implemented as a portion of a protected content addressable memory.