Trojan

About: Trojan is a research topic. Over the lifetime, 2028 publications have been published within this topic receiving 33209 citations.

The Motion of The Perihelion of Trojan Asteroids

Abstract: The problem is investigated by using the equations of Jupiter's main perturbations in the eccentricity and in the perihelion longitude of Trojan asteroids. The limits and the period of the variation of the eccentricity and of the perihelion longitude are calculated for 30 Trojans. The perihelion is shown to circulate in 20 cases and to librate for 10 asteroids.

Method and device for detecting Trojan in non-executable file

Abstract: The invention discloses a method and a device for detecting Trojan in a non-executable file. Based on the Trojan property of the non-executable file, a process to be monitored is determined by operating a detection program of a system user layer and file creating operation of the process is monitored by operating a monitoring module of a system kernel layer to judge whether a file extension name is an executable file extension name under the system or not and judge whether the format of a written file contains the format characteristic of the executable file under the system or not so as to judge whether the program releases the executable file or not, namely, whether the Trojan exists in the non-executable file or not. The method and the device can effectively ensure the Trojan detectionreliability for the non-executable file and is suitable for processing batch non-executable files and suitable for various operation systems.

Hardware Trojan detection by specifying malicious circuit properties

Abstract: This work addresses the increasing danger of shipping integrated circuits (either fully digital or mixed signal) that contain malicious hardware modifications. Potential security threads are established by so called hardware Trojans, implemented in the physical silicon structure. A desire of system engineers is to identify such back-door functionalities during an early design phase. The paper discusses how techniques deduced from model checking applications can be used for Trojan detection. A set of potential malicious properties is defined and handed to an automatic tool. Any returned counterexample identifies a feasible attack path and is a basis for further detailed inspection.

The Trojan Color Conundrum

Abstract: The Trojan asteroids of Jupiter and Neptune are likely to have been captured from original heliocentric orbits in the dynamically excited ("hot") population of the Kuiper belt. However, it has long been known that the optical color distributions of the Jovian Trojans and the hot population are not alike. This difference has been reconciled with the capture hypothesis by assuming that the Trojans were resurfaced (for example, by sublimation of near-surface volatiles) upon inward migration from the Kuiper belt (where blackbody temperatures are $\sim$40 K) to Jupiter's orbit ($\sim$125 K). Here, we examine the optical color distribution of the \textit{Neptunian} Trojans using a combination of new optical photometry and published data. We find a color distribution that is statistically indistinguishable from that of the Jovian Trojans but unlike any sub-population in the Kuiper belt. This result is puzzling, because the Neptunian Trojans are very cold (blackbody temperature $\sim$50 K) and a thermal process acting to modify the surface colors at Neptune's distance would also affect the Kuiper belt objects beyond, where the temperatures are nearly identical. The distinctive color distributions of the Jovian and Neptunian Trojans thus present us with a conundrum: they are very similar to each other, suggesting either capture from a common source or surface modification by a common process. However, the color distributions differ from any plausible common source population, and there is no known modifying process that could operate equally at both Jupiter and Neptune.

Hektor: the largest highly elongated asteroid.

Abstract: New observations of Trojan asteroid 624, Hektor, in April 1979 establish that the high amplitude of the rotational light curve of this object is caused by its elongated shape and not by patches of dark and light albedo on opposing hemispheres. These observations confirm the fact that Hektor is a very unusual object and are consistent with the hypothesis that it may be a compound asteroid formed when two Trojans of comparable size fell together - a rare fossilized example of a planetary accretion process.