New Challenges

This page contains lists of recent and most difficult challenges. To play the challenges, please go to the challenges section.
computer celebrating
Recently Released
CategoryChallengePointsSolves
Crypto on the Web JSON in JSON 40 169 solves
Block Ciphers Oh SNAP 120 49 solves
Misc L-Win 120 41 solves
Misc Bruce Schneier's Password: Part 2 250 19 solves
Misc Bruce Schneier's Password 100 65 solves
Misc Mixed Up 120 48 solves
Crypto on the Web RSA or HMAC? 35 305 solves
Crypto on the Web JWT Secrets 25 387 solves
Crypto on the Web No Way JOSE 20 418 solves
Mathematics Jack's Birthday Hash 20 258 solves
Mathematics Jack's Birthday Confusion 30 270 solves
Crypto on the Web Token Appreciation 5 612 solves
Crypto on the Web JWT Sessions 10 503 solves
Mathematics Cofactor Cofantasy 150 83 solves
Block Ciphers Logon Zero 80 116 solves
RSA RSA Backdoor Viability 175 113 solves
Misc Jeff's LFSR 150 51 solves
General Transparency 50 743 solves
RSA Let's Decrypt Again 175 75 solves
Misc Twin Keys 100 72 solves
Misc Invariant 250 48 solves
Misc No Difference 175 74 solves
Misc Trust Games 150 62 solves
Misc PriMeD5 100 91 solves
Mathematics Ellipse Curve Cryptography 125 111 solves
RSA Let's Decrypt 80 142 solves
Elliptic Curves No Random, No Bias 120 71 solves
Elliptic Curves Edwards Goes Degenerate 100 75 solves
Mathematics Size and Basis 15 877 solves
Mathematics Gaussian Reduction 50 521 solves
Mathematics Find the Lattice 100 283 solves
Mathematics Vectors 10 917 solves
Mathematics Backpack Cryptography 120 176 solves
Mathematics Gram Schmidt 30 577 solves
Mathematics What's a Lattice? 40 632 solves
Mathematics Unencryptable 125 204 solves
Misc Too Many Errors 100 98 solves
Block Ciphers Forbidden Fruit 150 119 solves
Misc Collider 50 288 solves
Misc MD0 80 160 solves
Block Ciphers Triple DES 60 184 solves
Mathematics Modular Square Root 35 906 solves
Mathematics Broken RSA 100 321 solves
Mathematics Real Eisenstein 150 129 solves
Block Ciphers Keyed Permutations 5 1500 solves
Block Ciphers Structure of AES 15 1045 solves
Block Ciphers Round Keys 20 948 solves
Block Ciphers Resisting Bruteforce 10 1377 solves
Block Ciphers Confusion through Substitution 25 813 solves
Block Ciphers Bringing It All Together 50 577 solves
 


Least Solved
CategoryChallengePointsSolves
Misc Bruce Schneier's Password: Part 2 250 19 solves
Misc L-Win 120 41 solves
Misc Mixed Up 120 48 solves
Misc Invariant 250 48 solves
Block Ciphers Oh SNAP 120 49 solves
Misc Jeff's LFSR 150 51 solves
Misc Trust Games 150 62 solves
Misc Bruce Schneier's Password 100 65 solves
Elliptic Curves No Random, No Bias 120 71 solves
Misc Twin Keys 100 72 solves
Misc No Difference 175 74 solves
Elliptic Curves Edwards Goes Degenerate 100 75 solves
RSA Let's Decrypt Again 175 75 solves
Mathematics Cofactor Cofantasy 150 83 solves
Misc PriMeD5 100 91 solves
Misc Too Many Errors 100 98 solves
Misc Nothing Up My Sleeve 150 101 solves
Mathematics Ellipse Curve Cryptography 125 111 solves
RSA RSA Backdoor Viability 175 113 solves
Block Ciphers Logon Zero 80 116 solves
Block Ciphers Forbidden Fruit 150 119 solves
Elliptic Curves Moving Problems 150 128 solves
Mathematics Real Eisenstein 150 129 solves
Misc Toshi's Treasure 150 130 solves
Elliptic Curves ProSign 3 100 140 solves

Level Up

level up icon

You are now level Current level