r/crypto

r/crypto subreddit

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605
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1
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Posts

Reddit by kun1z January 11, 2026

Potential Telegram vulnerability

Reddit by AbbreviationsGreen90 January 10, 2026

Toward solving computational diffie Hellman on altbn128? An implementation for performing practical Miller s algorithm inversion over altbn128 in polynomial time.

[Just use the playground](https://sagecell.sagemath.org/?z=eJytWVtv20YWfg-Q_zB1sAipSjIvulDGqoDrykaAbGMnaWshjV2aHNmsKZLhRZaTGujLvu3jviyw--f6S_Y7c6FI2c6mwDqBLA_nXOac79yGizxdssK_5H0_jlm0zNK8ZC-Skl_yvMtmcRxlZRQcVPmKd9nRYZcdp_Ftki4jP34dJZddVnzIy6dPnj551nv4x-6zv0VxzHMWJSueF1GasEe24ufpk5Av2FIQnAuC0ph12Ycuu-4yHsddFnbZqsv2zb2nTxh-5OfOzo78sl-WfJmVBStTtoiSkPksS6OkZCcMcmesqIIrVl75JT44y_0brdzKjyvO9vvnSrZxAlEmm07Zqi9Zv72KCjJQzJc8Kf2SDoKVIuNBtIgCkhiQmQp2c8VzzkL2GzM-nBnXu47Jvma22d_SVX5GC3bN_sIc9tWUWepQ9JPlUNvY4csLHoawNAv5Zc45W1ZFyS444yuefLVjbghyXlZ50mT9jOVsyj6cXZOedN4i-shZuhDfFxGPQ1gEj2DyKOEhS2FuZhyefwLJneIsOHQ6122-heArj_YAb2jO8yUPI7_UgiRbQaFZF5K15NLm_61fwKLBFQ-uC2b4RVEtyQScICrFpXkIZZW8I3v3yGGXeVplhVmbddYP_Bym8-OovDVMGJnoHzEzngjLhtEqCjl7NjMOYQWz37TwM_Z9WvK9e4wXac54YDusuEornBXeIaP3WEl-f9hD0C_8rEav-YcqAoyw47ew_78cfeDHQRWTuStYn0kf7jp3fQnbquDSbFmeZoip2702-erMKL62hS-b1KTlihb9-6GyOP8UdvfvjBON62cQxRPInzID_ATD3dA09VfHbOxj6jEjoEgJBcUWRZIIrd2ln0QZHYnirBFkmok4jR_lhAt1qoiLk4Z0BglDnXCwIV009WQFD1KkB6VaU40PlQ-zg6BsW1JTSwyELbiASxeQ3FolHYJ04QdlKqAq4JvQ5v5WBjAKkSEAiPDzcAhrD7byC_kugcJLXpIa9FUYIkjznAdlfLuF458EEgKOLXVwhUrtQhqF-MgDCBZIozcy4AQgiHu_yVFmRwUykXGVE_z4Ms2j8mop0y62LFOYqOBJEZXRilPebPqyvM14g3MG_baSA7lP-EtjSPhNG3qXr7M0QYZmTQTdp9Um391lMok97npJLIGNfNWgBLzbCxrkWt4hZQmZyPbAQSfvGqD38uSWUGCj6nQKAkV1HxSV8HRT1S7xxRlwniTdBMCj-WNL11D5r4T9UOHZuhekqUh1JeFiDZSvyVpa4l3DrgV8TWWP5_BqyBbUWBC3Jg_Czz7zlRwuSymrJJe1DQvvv7Pew5p6ydFLPb0kP19i_d37LVzkt3XZv20pTgl6rRLxrXOOBAbytd3puBA16_sDw-xAuvg-MrZceEDOI0coSgEVICXMgawA1iyiEPnQkI-R7fKeyHbUO9i0-yV6qSSEaYrb5UWq0LApU5KOYCQINeVeM7p-KBQ-nhei4WKLKgkI1100GxFamivYNMZJr6LLq57qFARBsWFT5rcNpsIWZHEpv09sDbP9_GXfzzLobsz6IqaNd4SAW_u9-UUbe1s7-TrgWcl-pPoxy_M031IHB30jKyjB-kqwJAuJNCS8QNmAowO8qEokLgpZf8EvEbXhFifaSF3pFyHD2UaG00aGs4WML3La_8Xazpda2_nz1pYmaq7U5uLIUtwHrALAKgopcFUXLbfI9LPY-Tk5TCvY9FPME-Olebe9v-gLXkjr_X6dguQnGf6EEsnLFtBPOgaqJNL6dHrSbguomgkMSMorf0XVQraBonCpBvFeUZJU-BJH1zy-FUk3CUXlgziqyVP2SkKqlo6lEx3oUXDd5HnjCywFOiuQKsUDejAjWuiGFfZacrNVL1GBb9BOUSFtlVlVKpRiUzYzLJMZ0vpUPhOAGF1nw89Rca6Iz6UWKFMnrEOyTc1hO9lLHTZNI2nQ7u509a8derKhVCMSMl8Vl5Sgt6amh6RpyBxsGO6xTyd3zcKk97wSx5AWNmpLvDJBsH3YB-lbJ1n6JTgVbAXqLcUx27Xom7Z5sWiMGYQi5R9dux6UQQ9KP79EF4YZ9YbMSOHRMB0wcc9fxPK-ZlvRKou2ZtUMQ0ShDG90po2WV4ju1l0cTaZ4mlWlCuV9KJL88fu_SjpDFCqPiwFAs6hbtzp2desgBv5nzOmjaaCuhY4g7gjYd1wAFOToF7793hkOdulzxN6ANAObDIBR9wuGY3ue5wwcb2x77sQZDx38DEYDazgeDJ3hGCuW540mI9e2bfw5GXuOOxo5I29iuWNvgq0gGTmWN_Rc8M7_NO_hwHNHg4FlDeyR5Q7wbzTxHPzljYbjoWd5g8lwZI9NcWB26Oyxo0MjO0O6v4Fh0MqGVVwVbH3myFHv0On_9aPzDfSgfZ0O8rLaM13jL9EnSl7fVlGs2yB5yaKc9JwHz5khoHQTFSXlPVo35Xh-6BDxW_2UYSyoryJuz6hdWp9R7XJ315G6iMAXpIQJFj9Se8oD_Nm62DHeHTpIEl0wN9xdvdN8rzQVLpU5AlO2RE-zhqaymT2EWXotleUpapqo3ip2gfupKriGRJdjO541nAzwb2h7k4ljD13XGg690dhzyZWONfIcuGsyGU1cONiFm1xatDzLssaO7boDb-R544HrIAN-hL0lZxu-Hk9suNp1J_D_0CEC1wKyIGc8tm2AaoDfQwtoA5om1nAwHnggcWwItwdj0I4tYO_pEyg-bytuWx6UGVkgHo5G1gTIHA6ILfSBVgMbipJ4C2w813VtYGpk4T-kWg7Yj8YjezgZus5k2NbbBiQtbzTCOYeePXRcdzgEhIcAsgt-OLRrgXZsCQtNxsOJZwPcCJPBeESyrQFE2RMoZQnN29DDEPgrEhGNYdJHO1m50_KS9iUCl1I9D4x3wmtdNpe_bIKJzrzHggnRt3Fw5FDyzkqRblXycPvsh0TsE2OfRIpkQLnoyBZIV3P6pt9W10m6QLk9P8RqfU0G_keIwZvPxGCP2V5nDZB7jo5r26FuQIS2vR3bxhpriuhspMlAgki3G2LstpwHaEhUr9djB69ev54dvJ19x2brMvdFI0-T0aGjR6KCibvQU1QKvlicH1JcC7Oj4dPXr4bZj2E8Q8CxsW_--D5SQIlEBC_lnFyQ6NPunCxQi1cXaxd-wWX3ouxOR6XA9enYjrFREDMarV_cWxf4mKv9863984t767ZOO_tZhm5NZxbW-4bwERXpMs0z1KklpFFDbUCXHju96EzoltU4vTARQTfAzlw8ndPTuX46r59qzKJ6ygHvPmjnNollpzYSag8J9QYg3gHubQmiUzE_9kh9F7M_uEJx1HeaXYzHN1FxP6J0q2-wlR4_-XkC_O6pECAuUAlHbmsFhPG4v_MFaDpqoImihUC-uU0W-KLLrBu5KIyboLGlbavIZ8D22Yi2nNrqWhA7DDVagtO6pBscBdzM7FNHm9CFUlRStwRvRkEkhNNtQdYndykvHwk4249gubVr_sgupdgUHfrX7KJzI_BxShTQ3_DJ2fRFuFudpH7a0INQqLY2V4FB0Bkg7HRGpJMmnT9IOv8MaRvJ3x28PP3xBSvK25iz4ipalDRLUL-4uZxlVaJdfq_W4hQu2c6pZRDo5rQ236y5rTy_1V7ILgJONjZyBKj22v2D6BRs54FewVbNgk2Y1tFKQEKmLsq8CuRpto9xbBGgBU-jbNwW7m_uC2_TKm-__AF30E0FmXHqIvpcsxG6eGb8UMupO419U4uigD22GoEJikg-0vGX-xGS3GuoizQnOmljh3YVOgaFyn_8_k-46obnu40UBF0L0fvv6XmQGuxia9TVn6h5g77sg1HdVJxT56xmiRkNE-q2UjvPlylYuk7ZUbzJMhBzqk4-fTI7F7u2XSWSdZcZVhfuNAUSAT1I9POQNLjkCUdRBRNiJJt1atVx9OPzI5E-7a640lR_SjlYdAS345IuCsQYe8FpVF_64jVKXEZZXL8M2kgRieCM6iRSRyVue6PyucwtOIVkp3xNEimSbJtt2oufkzdChNiorCG-G1BP3VBQoyEW73SSlBbP_Nxf8hKjDYAdx6qBy2nWe_XYu6SnT0Kxj7V3Nt8xKN_p-zgp8QC1tcKIuwLdsbWZjoVeXTmZG9tvVEwZRvRyQcKvERxddU61eiJX-3oUEPfIdNH8xr_ktS7sFy34F-Fgv578Aj34F_QaJ6lf46yUVYSwhtqW0Jkemu3KKc8Z4qCGmntVyRGVclVTCPAP-6hQPCDDqHO_0KOmMJoATzP4ZR-2L4yo70BUPApjzab0tcs-TLMuu54KYMXxNO-ykD5W05VsUfenx2h-TzBdB5T9oO906xWz5AMuenqEhPrMYCd_KXbCOm1DUB2WV_2v5QSPhZ1GX_wqjy7F4xPKQIDoQz-fjq27JtHrWt0TqhIXdM-QZfjzwkeqwcqRQ1com2PViK-vrMVL7ppNPYaJ97WIBmr55C2HVE-kyZadyPR7W7cNf_z77-xNFQS8KPZYU0l9DXJsiRfTPC74Pdr__IMd-lFc5bxNG6Yg_P7VW8mEombH_C9qtjgA&lang=sage&interacts=eJyLjgUAARUAuQ==). Of course it can also work for retriving G_1 but in such a case the pairings consists of e(G_2,G_1)

Reddit by tcoder7 January 9, 2026

The $5 Wrench Problem: Why Layered Crypto Matters

The $5 wrench attack shows crypto fails under coercion. Sanctum tries to fix this by making coercion non‑verifiable. How it works: Panic password → instantly shows “vault deleted” before any crypto. Indistinguishable from real deletion. Decoy password → unlocks harmless data. Hidden password → real secrets, existence can’t be proven. …

Reddit by -CAPOTES- January 8, 2026

My take on a modern computer assisted codebook.

I've always been interested in cryptography, coding, computer science. Unfortunately I just have never had the time to learn how to code and went a completely different career route. Full disclosure, I had lots of help from OPUS 4.5 creating this modernized codebook program. I would like to share to …

Reddit by fosres January 8, 2026

Cryptographic Failures Drops to 4th Place in OWASP Top Ten 2025

I think this is good news worth sharing: Cryptographic Failures drops to 4th place in the new [OWASP Top Ten 2025](https://owasp.org/Top10/2025/) Why do you all think this happened? Would love to hear your thoughts?

Reddit by Difficult_Jicama_759 January 7, 2026

Psi-commit cryptographic commitment scheme?

My last post: https://www.reddit.com/r/Python/comments/1nlvv14/pure\_python\_cryptographic\_commitment\_scheme/ Hello everyone, when I had last posted on r/python, the post named: (Pure Python Cryptographic Commitment Scheme: General Purpose, Offline-Capable, Zero Dependencies) I also posted on other subreddit's and found that I needed to create a complete version of the snippet of code I had provided. …

Reddit by rosulek January 6, 2026

I am the author of The Joy of Cryptography, which is finally in print today. Ask me anything.

My textbook *The Joy of Cryptography* is released in print today! Some of you may be familiar with early PDF drafts of the book. The new edition is a complete re-write: the coverage of existing material is greatly improved, and a lot of new material has been added ([table of …

Reddit by Remarkable_Depth4933 January 6, 2026

I built a public RSA challenge using the original RSA Factoring Challenge numbers

This is a small cryptography experiment I’ve been working on. I took the original RSA Factoring Challenge numbers (from the 1990s) and encrypted short messages with them using a fixed public exponent. Each challenge provides: \- the RSA modulus (n) \- the public exponent (e) \- the ciphertext (c) The …