search for: diversifications

Hello, I am Uppinder Chugh (irc nick: icebyte), a senior year undergraduate student majoring in Computer Science and Engineering at Indian Institute of Technology, Guwahati. I'm interested to work on the idea of adding the functionality of search result diversification to Xapian. After having brief conversations with mentors on IRC, I would like to compile the discussions and further discuss

We are equally excited about working with you over summer. I think you missed reply by Olly on IRC, you can find it in logs here: https://botbot.me/freenode/xapian/2018-04-24/?msg=99336093&page=1 - olly icebyte[m]: i think that probably needs to go through SFC ( https://sfconservancy.org/) as the "legal entity" - 2:05 am

Hello, I am a undergraduate student at DA-IICT,India pursuing Btech in Information and Communication Technology.Major field of my Research is Information Retrieval and Natural Language processing. xapain being an powerful Information retrieval library have attracted me towards implementing stuff learned in class for this project.I have worked on entity search on RDF data,SMS based FAQ

On Sun, Jul 31, 2016 at 12:44:16AM +0100, Olly Betts wrote: > Would a method which swapped two elements of an MSet provide what you > need? That would provide a more generic way to adjust the ranking of > an MSet which for example could be used to implement a diversification > feature or something like SQL "GROUP BY". Isn't the most common use going to be that the

Dear All, I'm guruprasad hegde. I would like to contribute to Xapian through GSOC-2018. Thank you for this wonderful opportunity. My Introduction: I study MSc in Computer science at the University of Saarland. I finished my 4th semester. Some of the courses I took include NLP, Information Retrieval & Data mining, statistical learning. These courses helped me develop the interest in

> > > I'd prefer to avoid adding things to the public API that don't get > used by end users. However because LTR is outside the Xapian build > tree, we can't easily give it privileged access to Xapian internals. > Sorry for a delayed response. The way I was thinking of performing reranking with updated weights was to add a class MSetRanker (basically containing a

Hi, I have reconstructed ancestral character states on a phylogeny using MuSSE in the diversitree package and plotted the character state probabilities as pie charts on the nodes. I would, however, like to colour the character states of my extant species, i.e. the tip labels, the same colours as my pie charts, such that all species in state 1 are e.g. blue, species in state 2 red and species in

> > We would also include a secure random number generator which links > > against OpenSSL. This would of course be an optional module disabled > > by default, but is necessary so the randomization is cryptographically > > secure and useful in security applications. > > I am not sure why you need this feature. You can provide LLVM with a > SEED value that can be

Ape is an R package for "analyses of phylogenetics and evolution". The first version (0.1) has been released on 27 August 2002 and is available on CRAN. >From the 'Description' file of version 0.1: Ape provides functions for reading, and plotting phylogenetic trees in parenthetic format (standard Newick format), analyses of comparative data in a

...ite will need to test at least 3 major areas: making sure that RNG results are consistent and deterministic, testing that NOPs are actually inserted and scheduling decisions randomized, and verifying that different seeds result in entirely different binaries with approximately equal amounts of diversifications. Speaking of maintenance, we plan to continue work on this in our lab. We can certainly maintain these features at least for the next year and a half, and possibly longer. > There's a "good news" side to this too. Over lunch I talked with one > of our security guys, and he&...

On Mon, Aug 26, 2013 at 9:14 PM, Todd Jackson <quantum.skyline at gmail.com>wrote: > > > We would also include a secure random number generator which links >> > against OpenSSL. This would of course be an optional module disabled >> > by default, but is necessary so the randomization is cryptographically >> > secure and useful in security applications.

Thanks for all the feedback! It seems there is some interest, so I thought I'd try to summarize discussions so far, and provide patches for closer inspection. I'm not sure if patches should end up here or on a different list in this instance, so if I should instead send this to a different list, I'm happy to do so. - Is diversity needed, or are existing protections sufficient? As

Hi Stephen, > Greetings LLVM Devs! > > I am a PhD student in the Secure Systems and Software Lab at UC > Irvine. We have been working on adding randomness into code generation > to create a diverse population of binaries. This diversity prevents > code-reuse attacks such as return-oriented-programming (ROP) by > denying the attacker information about the exact code layout.

...o test at least 3 major areas: making > sure that RNG results are consistent and deterministic, testing that NOPs > are actually inserted and scheduling decisions randomized, and verifying > that different seeds result in entirely different binaries with > approximately equal amounts of diversifications. > I really like the idea of verifying that ROP gadgets work across different variants. Even if it doesn't fit in the regression test suite, it should be set up as an integration test. The other three areas you identified largely fit in the regression suite. Thanks! Speaking of maintenanc...

Greetings LLVM Devs! I am a PhD student in the Secure Systems and Software Lab at UC Irvine. We have been working on adding randomness into code generation to create a diverse population of binaries. This diversity prevents code-reuse attacks such as return-oriented-programming (ROP) by denying the attacker information about the exact code layout. ROP has been used is several high-profile recent

Stephen Crane wrote: > Thanks for all the feedback! It seems there is some interest, so I thought I'd try to summarize discussions so far, and provide patches for closer inspection. I'm not sure if patches should end up here or on a different list in this instance, so if I should instead send this to a different list, I'm happy to do so. > > - Is diversity needed, or are

On 26 August 2013 11:39, Stephen Crane <sjcrane at uci.edu> wrote: > Greetings LLVM Devs! > > I am a PhD student in the Secure Systems and Software Lab at UC > Irvine. We have been working on adding randomness into code generation > to create a diverse population of binaries. This diversity prevents > code-reuse attacks such as return-oriented-programming (ROP) by >

On 8/28/13 4:37 PM, Nick Lewycky wrote: > On 26 August 2013 11:39, Stephen Crane <sjcrane at uci.edu > <mailto:sjcrane at uci.edu>> wrote: > > Greetings LLVM Devs! > > I am a PhD student in the Secure Systems and Software Lab at UC > Irvine. We have been working on adding randomness into code generation > to create a diverse population of

Dear OpenSSH developers, I've worked this week on an alternative key exchange mechanism, in reaction to the whole NSA leaks and claims over cryptographic backdoors and/or cracking advances. The key exchange is in my opinion the most critical defense against passive eavesdropping attacks. I believe Curve25519 from DJB can give users a secure alternative to classical Diffie-Hellman (with fixed