24 research outputs found
Poster Abstract: Efficient Browser Identification with JavaScript Engine Fingerprinting
No full textFor security and privacy on the Internet the webbrowser has become an important piece of software. Nowadays even mobil devices include a powerful browser, and in combination with cloud computing the webbrowser mimics more and more operating system functionality. For many use cases, legit server operators as well as attackers need to find out the exact version of a particular user's webbrowser. While the user agent string (which is currently used for that purpose) can be easily manipulated, certain aspects of the underlying software cannot. In our approach we will use the deviance of Javascript engine implementations to identify the browser accurately. This approach is efficient and has low computational overhead, and might be used to identify the version of the webbrowser regardless of the possibly manipulated user agent string
Fast and Reliable Browser Identification with JavaScript Engine Fingerprinting
No full textWeb browsers are crucial software components
in today's usage of the Internet, but the reliable detection
of whether a client is using a specific browser can still be
considered a nontrivial problem. Reliable browser identification
is crucial for online security and privacy e.g., regarding drive-by
downloads and user tracking, and can be used to enhance the
user's security. So far the UserAgent string is often used to
identify a given browser, but it is a self-reported string provided
by the client and can be changed arbitrarily.
In this paper we propose a new method for identifying web
browsers based on the underlying Javascript engine, which can
be executed on the client side within a fraction of a second. Our
method is three orders of magnitude faster than previous work
on Javascript engine fingerprinting, and can be implemented with
well below a few hundred lines of code. We show the feasibility of
our method with a survey and discuss the consequences for user
privacy and browser security. Furthermore, we collected data for
more than 150 browser and operating system combinations, and
present algorithms to make browser identification as fast as possible.
UserAgent string modifications become easily detectable with
JavaScript engine fingerprinting, which is shown exemplarily on
the Tor browser bundle as it uses a uniform UserAgent string
across different browser versions. Finally, we propose to use our
results for enhancing state-of-the-art session management (with
or without SSL), as reliable browser identification can be used to
increase the complexity of session hijacking attacks considerably
Clinical outcomes after treatment of quadriceps tendon ruptures show equal results independent of suture anchor or transosseus repair technique used – A pilot study
No full text
Transosseous sutures passed through patella.
No full textTransosseous sutures passed through patella.</p
Rotational Stability of Scaphoid Osteosyntheses: An In Vitro Comparison of Small Fragment Cannulated Screws to Novel Bone Screw Sets.
No full textBACKGROUND:The current standard of care for operative repair of scaphoid fractures involves reduction and internal fixation with a single headless compression screw. However, a compression screw in isolation does not necessarily control rotational stability at a fracture or nonunion site. The single screw provides rotational control through friction and bone interdigitation from compression at the fracture site. We hypothesize that osteosyntheses with novel bone screw sets (BSS) equipped with anti-rotational elements provide improved rotational stability. METHODS:Stability of osteosynthesis under increasing cyclic torsional loading was investigated on osteotomized cadaveric scaphoids. Two novel prototype BSS, oblique type (BSS-obl.) and longitudinal type (BSS-long.) were compared to three conventional screws: Acutrak2®mini, HCS®3.0 and Twinfix®. Biomechanical tests were performed on scaphoids from single donors in paired comparison and analyzed by balanced incomplete random block design. Loading was increased by 50 mNm increments with 1,000 cycles per torque level and repeated until a rotational clearance of 10°. Primary outcome measure was the number of cycles to 10° clearance, secondary outcome measure was the maximum rotational clearance for each torque level. FINDINGS:BSS-obl. performed significantly better than Acutrak2®mini and HCS® (p = 0.015, p<0.0001). BSS-long. performed significantly better than HCS® (p = 0.010). No significant difference in performance between BSS-obl. and BSS-long. (p = 0.361), between BSS obl. and Twinfix® (p = 0.50) and BSS long. and Twinfix® (p = 0.667) was detected. Within the torque range up to 200 mNm, four of 21 (19%) BSS-long. and four of 21 (19%) BSS-obl. preparations showed early failure. The same loading led to early failure in four (29%) Twinfix®, seven (50%) Acutrak2®mini and 10 (71%) HCS® of 14 screw samples, respectively. CONCLUSIONS:For both BSS and to a lesser extent for Twinfix® (as dual-component screw), higher rotational stabilities were identified in comparison to single component headless compression screws
