All common approaches to digital signatures use what is called Public Key Cryptography. In Public Key Cryptography, there are two keys: one public and one private. To create a signature, the first hash is produced of the original data, and then the private key is used to encrypt that hash. That encrypted hash, along with other information, such as the encryption method used to become part of the signature, are attached to the original data.
This is where the public key comes into play. The mathematical link between the public key and the private key allows the public key to decrypt the hash, and then the hash can be used to check the data. Thus, two things can now be checked: who signed the data and that the data that was signed has not been altered. The following is a diagrammatic representation of the same:( figure 2 )
This form of cryptography is critical to blockchain technology. Through hashing and digital signatures, a blockchain is able to record information both on actions (movement of tokens) as well as prove who initiated those actions (via digital signatures).
clutter
*['klʌtә]
n. 杂乱
vt. 弄乱, 使凌乱
【电】 混杂
相关词组:
in a clutter
<1> verb
intransitive senses , chiefly dialect : to run in disorder
transitive senses : to fill or cover with scattered or disordered things that impede movement or reduce effectiveness often used with up
<2> noun
1 a : a crowded or confused mass or collection b : things that clutter a place
2 : interfering radar echoes caused by reflection from objects (as on the ground) other than the target
3 chiefly dialect : DISTURBANCE, HUBBUB
昨天阅读1小时,累计阅读343小时。 昨天继续学习了经济学中的公共选择理论,第二次世界大战结束之后,当时许多经济学家都受到凯恩斯的影响,认为ZF应该在经济中发挥重要作用,特别是向富人征税、向穷人派钱,通过支付医疗和教育开支,来重新分配财富。可是诺贝尔经济奖得主美国经济学家詹姆斯·布坎南(James M. Buchanan)认为,像腐败的政治人物所声称的服务社会福祉是一个大大的泡沫,布坎南年轻的时候相信国家有能力搞定一切