A framework for trusted instruction execution via basic block signature verification
1 / 14

- PowerPoint PPT Presentation

  • Uploaded on

A Framework For Trusted Instruction Execution Via Basic Block Signature Verification. Milena Milenković, Aleksandar Milenković, and Emil Jovanov. Electrical and Computer Engineering Dept. The University of Alabama in Huntsville {milenkm|milenka|jovanov}@ece.uah.edu. Outline. Introduction

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about '' - salena

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
A framework for trusted instruction execution via basic block signature verification l.jpg

A Framework For Trusted Instruction ExecutionVia Basic Block Signature Verification

Milena Milenković, Aleksandar Milenković, and Emil Jovanov

Electrical and Computer Engineering Dept.

The University of Alabama in Huntsville


Outline l.jpg

  • Introduction

  • Related Work

  • Trusted Instruction Execution Framework

  • The Framework Potential

  • Conclusion

Introduction l.jpg

  • Most of today’s computers connected to Internet security is a critical issue

  • Even more so in the future

  • One of the major security problems: the execution of the unauthorized code

  • A lot of applications may be vulnerable

  • Attack examples:

    • buffer overflow (heap, stack)

    • format string attack

Introduction4 l.jpg

  • We propose a processor architecture that

    • will allow execution of the trusted instructions only

    • will not significantly increase the program execution time

Related work l.jpg
Related Work

  • Two categories:

    • Static source code analysis

    • Dynamic detection/prevention

  • Static code analysis: false alarms

  • Dynamic

    • Monitoring program behavior (system calls, performance monitoring registers)

    • Compilers, safe language dialects

    • Secure Program Execution Framework (SPEF)

    • Tag data from “spurious” channels

    • Split stack for data/addresses, or secure stack

Trusted instruction execution l.jpg
Trusted Instruction Execution

  • Atomic code unit protected by its signature: a basic block

  • Verify all basic blocks?

  • Cache memory is safe:verify the signature of basic blocks that generated a cache miss

  • Text memory write protected:check only last basic block in a stream

Architecture for trusted computing l.jpg





Architecture For Trusted Computing

BBST – Basic Block Signature Table

BBST_M – Basic Block Signature Table (Memory)

BBSVU – Basic Block Signature Verification Unit










Phases of the security mechanism l.jpg
Phases of the Security Mechanism

  • Compilation

    • Compiler generates a list of basic blocks

  • Secure program installation

    • Signature table (BBST_M) is generated, encrypted and appended to the program binary

  • Program loading in the memory

    • BBST_M is decrypted, loaded in the memory

  • Program execution

    • Signature of each last basic block in a streamthat generated a cache miss is verified

    • If no match, a trap to OS – kill process & audit

Signature generation l.jpg
Signature generation

  • MISR (Multiple input signature register)

  • Linear feedback coefficients – based on the processor secret key

The framework potential l.jpg
The Framework Potential

  • 32-bit MISR

  • I-cache: 4 ways, 128 sets, 64B line

  • BBST: 4 ways, 4B line, 128/256 sets

  • LRU replacement

  • Traces of SPEC CPU2000 benchmarks for Alpha architecture

    • F2B, M2B segments

  • Measure: BBST misses per 1 M instructions

Conclusion l.jpg

  • Proposed a framework for trusted instruction execution,evaluated potential

  • Promises to be faster than SPEF, with additional hardware resources and BBST appended to program binary

  • Future work:

    • different BBST organizations and sizes

    • detailed performance evaluation

    • an alternative implementation:signature embedded in the code