Use this tag for questions about challenge-response authentication. Do NOT use it because the question is related to some programming challenge.
Questions tagged [challenge-response]
106 questions
1
vote
1 answer
How to Go back from particular activity to Navigation Drawer activity
When i click my account in navigation drawer(HomePage.java) moving to account activity(account.java).when i tried to click go back in account(account.java ) my app stops.I tried a lot but nothing helped me.I'm new to Android.
11-10 00:03:56.739…
Liyakath S
- 11
- 4
1
vote
0 answers
FIDO U2F Key: Sign authentication challenge in Chrome returns error code 4 (works in FF)
We are trying to add authentication via Yubico FIDO U2F Security Key to our admin website.
This works in FireFox with the U2F add-on installed but signing a challenge (using javascript) to log in keeps returning {errorCode: 4}.
Does anyone know…
Dean Voets
- 21
- 4
1
vote
1 answer
How to add a new column or table to sqlite database pre-populated in the assets and using SQLiteAssetHelper
How can I add a new column or new table to the database that pre-populated (in the assets) using SQLiteAssetHelper.
I originally preload a simple table with 3 columns:
id
question
answer
Once installed the app, I need to add some columns that…
AndroPro
- 15
- 1
- 7
1
vote
2 answers
Hackerrank String Function Calculation
I'm trying to solve the String Function Calculation problem from Hackerrank. In this problem, we're given a string as input and asked to print a number that represents the maximum of the following function, among all substrings of the input…
Marcus Vinícius Monteiro
- 7,669
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- 39
1
vote
1 answer
Solving a Programming Challenge: Apparatus, from Kattis
I am trying to solve apparatus problem described here. And I have a solution but it takes longer than 2 seconds which the time limit. I've tried to optimize my code for speed but can't get it with in the 2 second limit.
import sys
import math
for…
Ragnar
- 169
- 7
1
vote
6 answers
The sum of all the multiples of 3 or 5 below N
I have to find the sum of all the multiples of 3 or 5 below N.
example if we have to list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9,the sum of these multiples is 23.
Now the only problem left is that I want…
Hadh
- 317
- 1
- 7
- 22
1
vote
0 answers
Can someone explain me Topcoder randomn pancake challenge's DP solution in SRM656
The challenge is as follows:
http://community.topcoder.com/stat?c=problem_statement&pm=13747&rd=16416
Charlie has N pancakes. He wants to serve some of them for breakfast. We will number the pancakes 0 through N-1. For each i, pancake i has width…
Urvishsinh Mahida
- 1,440
- 16
- 23
1
vote
0 answers
How to deal with anonymous login attempts when you allow both anonymous access and logged in users?
I have a framework that allows anonymous access as well as named user accounts. I'm exposing an OData resource on a certain URL. When configured as such, anonymous users can see parts of the resource and logged in users (through basic…
Sebastiaan van den Broek
- 5,818
- 7
- 40
- 73
1
vote
1 answer
Consecutive Primes Challenge
I am working on Consecutive Primes Challenge @ codeeval.com and can't pass the automatic grader. I think i am getting correct results but possibly missing some edge cases. I tried recursion but couldn't get it to work and it was too slow. Figured…
Yan
- 3,533
- 4
- 24
- 45
1
vote
1 answer
Inescapable while loop in Simple Interest calculator
I was trying to solve the /r/DailyProgrammer challenge number 2, Easy https://www.reddit.com/r/dailyprogrammer/comments/pjbj8/easy_challenge_2/
I am trying to do this in python using a functions and a series of nested if-elif-else's
here's my…
Zunon
- 137
- 1
- 8
1
vote
0 answers
how to access digest authentication in java
always out print the same message.. what is my fault?
result message [responseCode : 401, responseMessage : Unauthorized]
//http request1
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.connect();
//http response1 401…
osnium76
- 67
- 8
1
vote
0 answers
Linux Pam authentication by answering to a challenge
I am trying to find a module that can help to ask a question to end an authentication. for example when I connect in ssh, the module ask me to resolve a equation or to answer to a question.
user2354740
- 43
- 4
1
vote
2 answers
What are some efficient ways to generate challenge/response for a backdoor entry scheme?
We have a system that uses password authentication to access a database, the usernames and encrypted passwords are stored in the database. when a user forgets their password, (or the administrator leaves for greener pastures) we want to be able to…
Aran Mulholland
- 23,555
- 29
- 141
- 228
0
votes
1 answer
Java: Remove child object from menu tree
I have this UI object with below structure, i dont have control on how that list is populated, but i had to remove some child items meeting my condition, can anyone please suggest how i can do it (Language is Java)
Class definition
Class MenuItemObj…
vjkumar
- 39
- 5
0
votes
1 answer
find a,b from a given gcd and lcm
The problem was to find two numbers,
and
, such that their greatest common divisor and their least common multiple would add up to a given number,
. Moreover, the difference between the two numbers should be as small as possible, and
must be…
Mansouri Rayen
- 13
- 5