## Is the vulnerability described in rfc6749 10.16 for implicit Flow is comparable to “man in the middle”?

I’m trying to understand if the vulnerability described in the specification for implicit flow : link is the same principle of a man in the middle attack. From what I understood, the malicious client get in the way of the access token grant and then impersonate an issuer. Yes he isn’t really “in the middle” like the aforementioned but there’s still an impersonation in place.

I’m asking here because there might be some concepts I didn’t grasp and I want to gain a full understanding of what I’m trying to implement.

Thank you in advance for enlightening me.

Posted on Categories proxies

## Understanding PDA for odd length string with middle symbol 0

I came across this pdf, which describes the language of odd length string with middle symbol 0 as follows: Doubts:

1. I dont understand the transition labels. In standard resources like books by Ullman et al, Linz and in wikipedia, the transition labels take following form:

• $$a,b/ab$$ means if next input symbol is $$a$$ and current stack top is $$b$$, then push $$a$$ on $$b$$
• $$a,b/\epsilon$$ means if next input symbol is $$a$$ and current stack top is $$b$$, then pop $$b$$
• $$a,b/a$$ means if next input symbol is $$a$$ and current stack top is $$b$$, then pop $$b$$ and push $$a$$

I dont get meaning of transition labels in diagram $$a,b\rightarrow c$$. Some one explained me that its, if next next input symbol is $$a$$, pop $$b$$ and push $$c$$. I feel, if this interpretation is correct, then this notation is insufficient as it will describe both $$a,b/ab$$ and $$a,c/ac$$ as $$a,\epsilon\rightarrow a$$. Am I right with this, or I understood the notation incorrectly?

2. Assuming above interpretation to be correct, loop on $$q_1$$ pushes all input symbols, be it 1 or 0. Then for $$0$$ at any position (not necessarily middle position), it transits to $$q_2$$. Loop at $$q_2$$ pops all symbols. I dont get how above PDA forces middle symbol to be $$0$$. Also I dont get how it ensures length of $$w$$ is odd.

3. If given PDA is incorrect, can we prepare correct one by re-labelling as follows:

• Loop at $$q_0$$: $$\{(1, /1);(0, /1);(0,0/00);(0,1/01);(1,0/10);(0,1/01)\}$$
• Transition $$q_0-q_1$$: $$\{(0,0/0);(0,1/1)\}$$
• Loop at $$q_2$$: $$\{(0,0/\epsilon);(0,1/\epsilon);(1,0/\epsilon);(1,1/\epsilon)\}$$

So, its CFL not deterministic CFL, right?

Posted on Categories proxies

## What is the middle name of “Thomas A. Henzinger”?

Continuing a similar question about Leslie B. Lamport, what is the middle name of Thomas A. Henzinger, a distinguished computer scientist (and the president of IST Austria)?

I know the middle name of The Computer Scientist Number One, “Donald E. Knuth”, is “Ervin”.

## Does a recursive call reset to the beginning of the method if the call is in the middle?

Or does it finish the method? Sorry for noob question.

Posted on Categories proxies

## [ Anthropology ] Open Question : Are Ashkenazi Jews like Gal Gadot genetically Middle Eastern? ?

Are Ashkenazi Jews more European or Middle Eastern genetically? And does Gal Gadot look Middle Eastern?

## Can a Man in the Middle attack on NFC be prevented by programming when working with NFC?

I have done research on how to authenticate NFC tags. Seeing how you can use digital signatures, or a hidden key on newer NFC tags, it seems safe. However none of it would prevent a Man in the Middle attack where a device can read and relay the commands a NFC reader/writer sends to a NFC tag, and use this to corrupt the data that is sent to be written on the NFC tag (even if the data was originally sent encrypted, it could still be turned into fake date).

Posted on Categories proxies

## ECDSA ECDH Man In The Middle Attack

We have a long-term key used for signing/verifying the ephemeral keys. The problem is we have to first share the long term public key with the other party. Is it possible to avoid a man in the middle attack without using certificates? I will be using this for a TCP chat.

## How to assign custom action to mouse middle click (something like libinput-gestures for mouse)?

I am running Ubuntu 18.04.2 and I want to assign a cstom action to middle click of my mouse. How that can be done? for example libinput-gestures (https://github.com/bulletmark/libinput-gestures) allows you to set custom actions to your trackpad gestures. Is there something like that for mouse also?

Posted on Categories Best Proxies

## Rename Batch files with sequential number in the middle of the file name

I have a bunch of file like this in a folder. ghyu_qwnm_lpo_117962956385902_20180125121100_446.xml I want to remove the older sequence “446” and add a new sequence like below: ghyu_qwnm_1_lpo_117962956385902_20180125121100.xml.

How can i achieve it with bash script ?

Posted on Categories Best Proxies