| Patent application number | Description | Published |
|---|
| 20100106929 | Method and Apparatus for Providing Secure Register Access - The method and accompanying apparatus provides secure register access. In one example, as part of a secure boot process, data is written into a managed secure register (MSR) register and access policy data is written into programmable MSR policy registers. During run-time, the MSR register securely stores data in compliance with the programmable register access policy data. Access policy is enforced during run-time based on the programmable register access policy data. | 04-29-2010 |
| 20100106979 | Method, Apparatus, and Device for Providing Security Among a Calling Function and a Target Function - The device and accompanying apparatus and method provides security among a calling function, such as an any executable code, and at least one target function, such as any executable code that the calling function wishes to have execute. In one example, the device includes an engine operative to perform run-time verification of the signatures of secure interrupt handler code and at least one target function before allowing execution of the at least one target function. If both the secure interrupt handler code's signature and the at least one target function's signature are successfully verified, the at least one target function is allowed to execute. | 04-29-2010 |
| 20100107249 | Method, Apparatus, and Device for Protecting Against Programming Attacks and/or Data Corruption - The method and accompanying apparatus and device protects against programming attacks and/or data corruption by computer viruses, malicious code, or other types of corruption. In one example, signature verification policy information that identifies a plurality of policies associated with a plurality of target memory segments is programmed during a secure boot process. The programmed signature verification policy information associated with each of the plurality of target memory segments is then evaluated during run-time. Signature verification is then repeatedly performed, during run-time, on each of the plurality of target memory segments based on the programmed signature verification policy information associated with each target memory segment. | 04-29-2010 |
| 20100111298 | BLOCK CIPHER DECRYPTION APPARATUS AND METHOD - An apparatus and method obtains cipher block chaining mode (CBC) ciphertext blocks that were encrypted using a cipher block chaining encryption method, such a audio or video, and decrypts the CBC ciphertext blocks that were encrypted using the cipher block chaining encryption method using a multistage counter mode (CTR) decryptor to produce blocks of plaintext data from the CBC ciphertext blocks. In one example, cipher block chaining mode (CBC) information is translated (e.g., rearranged) to random counter mode (CTR) information so that a multistage counter mode (CTR) decryptor decrypts CBC ciphertext blocks into corresponding decrypted CBC plaintext blocks, in a parallel fashion, based on the translated CBC information. As such, apparatus with CTR hardware can be used to decrypt CBC or CFB ciphertext blocks. | 05-06-2010 |
| 20110107092 | PERFORMANCE BASED AUTHENTICATION METHOD AND APPARATUS FOR SECURE COMMUNICATION - An apparatus includes a first module and a second module. The first module provides a challenge. The second module performs a signature function in response to the challenge. The first module authenticates the second module based on a time required by the second module to complete the signature function and/or an amount of power consumed by the second module to complete the signature function. | 05-05-2011 |
