New Challenges

This page contains lists of recent and most difficult challenges. To play the challenges, please go to the challenges section.
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Recently Released
CategoryChallengePointsSolves
Mathematics No Way Back Home 100 86 solves
Symmetric Ciphers Beatboxer 150 43 solves
Hash Functions MDFlag 125 43 solves
Crypto on the Web TLS Handshake 15 95 solves
Crypto on the Web Saying Hello 20 92 solves
Crypto on the Web Secure Protocols 5 111 solves
Crypto on the Web Sharks on the Wire 10 100 solves
Elliptic Curves Real Curve Crypto 200 26 solves
Crypto on the Web RSA or HMAC? Part 2 100 308 solves
Mathematics Roll your Own 125 173 solves
Symmetric Ciphers Dancing Queen 120 201 solves
General SSH Keys 35 1570 solves
Misc LFSR Destroyer 250 56 solves
Hash Functions Hash Stuffing 50 303 solves
Elliptic Curves Montgomery's Ladder 40 313 solves
Elliptic Curves Double and Broken 50 171 solves
Diffie-Hellman The Matrix Revolutions 125 120 solves
Diffie-Hellman The Matrix Reloaded 100 189 solves
Diffie-Hellman The Matrix 75 256 solves
Crypto on the Web JSON in JSON 40 867 solves
Symmetric Ciphers Oh SNAP 120 199 solves
Misc L-Win 120 165 solves
Misc Bruce Schneier's Password: Part 2 250 78 solves
Misc Bruce Schneier's Password 100 227 solves
Hash Functions Mixed Up 120 205 solves
Crypto on the Web RSA or HMAC? 35 960 solves
Crypto on the Web JWT Secrets 25 1278 solves
Crypto on the Web No Way JOSE 20 1410 solves
Hash Functions Jack's Birthday Hash 20 938 solves
Hash Functions Jack's Birthday Confusion 30 893 solves
Crypto on the Web Token Appreciation 5 2176 solves
Crypto on the Web JWT Sessions 10 1756 solves
Mathematics Cofactor Cofantasy 150 250 solves
Symmetric Ciphers Logon Zero 80 397 solves
RSA RSA Backdoor Viability 175 460 solves
Misc Jeff's LFSR 150 139 solves
General Transparency 50 2265 solves
RSA Let's Decrypt Again 175 164 solves
Hash Functions Twin Keys 100 178 solves
Hash Functions Invariant 250 102 solves
Hash Functions No Difference 175 206 solves
Misc Trust Games 150 137 solves
Hash Functions PriMeD5 100 232 solves
Mathematics Ellipse Curve Cryptography 125 278 solves
RSA Let's Decrypt 80 357 solves
Elliptic Curves No Random, No Bias 120 182 solves
Elliptic Curves Edwards Goes Degenerate 100 185 solves
Mathematics Size and Basis 15 2040 solves
Mathematics Gaussian Reduction 50 1269 solves
Mathematics Find the Lattice 100 695 solves
 


Least Solved
CategoryChallengePointsSolves
Elliptic Curves Real Curve Crypto 200 26 solves
Symmetric Ciphers Beatboxer 150 43 solves
Hash Functions MDFlag 125 43 solves
Misc LFSR Destroyer 250 56 solves
Misc Bruce Schneier's Password: Part 2 250 78 solves
Mathematics No Way Back Home 100 86 solves
Crypto on the Web Saying Hello 20 92 solves
Crypto on the Web TLS Handshake 15 95 solves
Crypto on the Web Sharks on the Wire 10 100 solves
Hash Functions Invariant 250 102 solves
Crypto on the Web Secure Protocols 5 111 solves
Diffie-Hellman The Matrix Revolutions 125 120 solves
Misc Trust Games 150 137 solves
Misc Jeff's LFSR 150 139 solves
RSA Let's Decrypt Again 175 164 solves
Misc L-Win 120 165 solves
Elliptic Curves Double and Broken 50 171 solves
Mathematics Roll your Own 125 173 solves
Hash Functions Twin Keys 100 178 solves
Elliptic Curves No Random, No Bias 120 182 solves
Elliptic Curves Edwards Goes Degenerate 100 185 solves
Misc Nothing Up My Sleeve 150 188 solves
Diffie-Hellman The Matrix Reloaded 100 189 solves
Symmetric Ciphers Oh SNAP 120 199 solves
Misc Too Many Errors 100 200 solves

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