好的，用户让我帮忙总结一篇文章的内容，控制在100字以内，并且不需要特定的开头。首先，我需要仔细阅读文章内容，找出关键信息。 文章主要讲的是一个团队参加了UofTCTF 2026的比赛，获得了第48名，属于前4%。作者参与了密码学挑战，任务是猜测一个100位的随机数。挑战允许发送50个表达式查询，作者使用了二进制搜索策略成功完成任务。 接下来，我需要将这些信息浓缩到100字以内。要确保包含团队名称、比赛结果、挑战类型、目标和解决方法。同时，语言要简洁明了。 可能会遇到的问题是如何在有限的字数内涵盖所有关键点。可能需要合并一些信息，比如将比赛结果和团队排名结合起来。 最终的总结应该清晰传达团队的表现、挑战的难度以及解决方案的有效性。 </think> 团队w4llz在UofTCTF 2026中获得第48名（前4%），成员参与了密码学挑战“Guess the Number”，需在50次查询内猜出100位随机数。通过二进制搜索策略成功解决难题。 2026-1-15 08:25:6 Author: infosecwriteups.com(查看原文) 阅读量:0 收藏
Event: UofTCTF 2026 Category: Cryptography / Side-Channel Team: w4llz Rank: 48th out of 1,225 Teams (Top 4%!) 🚀 Author:K70n0s510\Nicholas Mullenski
Press enter or click to view image in full size
The Event
This weekend, The team that i am apart of, w4llz, participated in the University of Toronto CTF (UofTCTF) 2026. It was a massive event with over 1,200 teams competing from around the world. We pushed hard and secured a 48th place finish, landing us squarely in the top 4%.
While my teammates were doing the heavy lifting on the Web and Pwn challenges (huge shoutout to the whole squad for carrying the load!), I dove into a Cryptography challenge that looked impossible at first glance.
The Challenge: Guess the Number
Points: 179 (Dynamic Scoring) Difficulty: Medium
The premise was deceptively simple. The server generates a random 100-bit integer (x). We have to guess it.
The Catch:
- We can send expressions to the server to be evaluated.
- We only have 50 queries allowed.
- We need to find a 100-bit number.
In a standard binary search (asking “Is x>y?”), you eliminate half the possibilities with each question. This…
如有侵权请联系:admin#unsafe.sh