পদ্ধতির তুলনা করুন
নির্বাচিত পদ্ধতিগুলো পাশাপাশি পর্যালোচনা করুন; যে সারিগুলোয় পার্থক্য আছে সেগুলো চিহ্নিত করা হয়।
| ব্লকচেইন কনসেনসাস× | HMAC× | |
|---|---|---|
| ক্ষেত্র | ক্রিপ্টোগ্রাফি | ক্রিপ্টোগ্রাফি |
| পরিবার | Machine learning | Machine learning |
| উদ্ভবের বছর≠ | 2008 | 1997 |
| প্রবর্তক≠ | Satoshi Nakamoto | Hugo Krawczyk |
| ধরন≠ | consensus mechanism | cryptographic authentication mechanism |
| মৌলিক উৎস≠ | Nakamoto, S. (2008). Bitcoin: A peer-to-peer electronic cash system. Retrieved from https://bitcoin.org/bitcoin.pdf link ↗ | Krawczyk, H., Bellare, M., & Crechanko, R. (1997). HMAC: Keyed-Hashing for Message Authentication. RFC 2104. link ↗ |
| অপর নাম≠ | consensus algorithm, PoW, PoS, distributed consensus | HMAC, keyed hash function |
| সম্পর্কিত | 3 | 3 |
| সারসংক্ষেপ≠ | Blockchain consensus mechanisms are distributed protocols that enable a network of untrusted nodes to agree on the correct state of a ledger without a central authority. Introduced with Bitcoin in 2008, consensus mechanisms like Proof of Work and Proof of Stake ensure that modifications to the blockchain cannot be made unilaterally by any participant. Consensus mechanisms are fundamental to cryptocurrency and blockchain applications, making them resistant to tampering and censorship. | HMAC (Hash-Based Message Authentication Code) is a cryptographic algorithm for authenticating messages using a secret key and a hash function. Standardized in RFC 2104 (1997), HMAC can be combined with any cryptographic hash function (SHA-256, SHA-3, etc.) to create a message authentication code (MAC). HMAC provides both data integrity and authentication, detecting both accidental corruption and deliberate tampering, and is widely used in web security (TLS/SSL), API authentication, and network protocols. |
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