Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
Using Software-Based Decision Procedures To Control Instruction-Level Execution, William B. Kimball
Using Software-Based Decision Procedures To Control Instruction-Level Execution, William B. Kimball
AFIT Patents
An apparatus, method and program product are provided for securing a computer system. A digital signature of an application is checked, which is loaded into a memory of the computer system configured to contain memory pages. In response to finding a valid digital signature, memory pages containing instructions of the application are set as executable and memory pages other than those containing instructions of the application are set as non-executable. Instructions in executable memory pages are executed. Instructions in non-executable memory pages are prevented from being executed. A page fault is generated in response to an attempt to execute an …
Emulation-Based Software Protection, William B. Kimball, Rusty O. Baldwin
Emulation-Based Software Protection, William B. Kimball, Rusty O. Baldwin
AFIT Patents
A method of emulation-based page granularity code signing comprising the steps of: copying guest operating system instructions and associated hash message authentication codes and/or digital signatures of each guest operating instruction from an untrusted guest operating system memory into a trusted host operating system memory; recomputing the hash message authentication codes using a secret key in the trusted host operating system memory; maintaining the secret key in the trusted host operating system memory and inaccessible by the untrusted guest operating system instructions; translating each guest operating system instruction that has a valid hash message authentication code to a set of …