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UTCTF 19' Write-up / [basics] re [basics] re100I know there's a string in this binary somewhere.... Now where did I leave it?by balex This problem was really easy one if you know the usage of IDA application. I just opened the file and I got flag right away.Flag : utflag{str1ng5_15_4_h4ndy_t00l} Reference site : https://utctf.live/challenges#[basics]%20re 2019. 3. 15.
UTCTF 19' Write-up / [basics] crypto This time I took part in UTCTF. This is my approach. When I open the file, it has a binary string so I made a small code to figure out what messages in it a = "01010101 01101000 ...... " (Copy from the file)a = a.split(" ")d = "" for i in range(len(a)): d += chr(int("0b" + a[i], 2)) After that, I found below message, especially the encoding part. Uh-oh, looks like we have another block of text, .. 2019. 3. 10.
International Morse code (di-dah) dict = {'di-dah': 'A', 'dah-di-di-dit': 'B', 'dah-di-dah-dit': 'C', 'dah-di-dit': 'D', 'dit': 'E', 'di-di-dah-dit': 'F', 'dah-dah-dit': 'G', 'di-di-di-dit': 'H', 'di-dit': 'I', 'di-dah-dah-dah': 'J', 'dah-di-dah': 'K', 'di-dah-di-dit': 'L', 'dah-dah': 'M', 'dah-dit': 'N', 'dah-dah-dah': 'O', 'di-dah-dah-dit': 'P', 'dah-dah-di-dah': 'Q', 'di-dah-dit': 'R', 'di-di-dit': 'S', 'dah': 'T', 'di-di-dah.. 2019. 2. 25.
Security Engineer (Analyst) Intern Interview Questions 1. What is an antivirus and why antivirus needs for organizations?2. Explain Vulnerability, Risk, and Threat3. What is DDoS and how to mitigate?4. Explain Asymmetric and Symmetric encryption?: Follow up questions - If I focused on the speed, symmetric is better or asymmetric is better? Tell me the reasons5. Tell me Hashing, Encryption, and Encoding?6. Explain IDS and IPS7. What is a firewall?8. .. 2019. 2. 19.
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