Android bitcoin multi signature

1. I'll give you my address (address). You can find my zip code (public key). You can write to me with my zip code (public key) + address. The mail will be sent to my mail cabinet. I'll open the mail cabinet (private key) with the key I have. The key of express cabinet is stored in my wallet (wallet)
1. The mail cabinet is stolen (the database is stolen)
2. The key is stolen (the private key is stolen)
3. Knowing my home address (the public key is stolen), the lock of the mail cabinet is opened violently (the private key is cracked violently).

2. The digital signature of bitcoin is an anti-counterfeiting string generated only by the transferor of bitcoin transfer. By verifying the digital string, on the one hand, it proves that the transaction is initiated by the transferor, on the other hand, it proves that the transaction information has not been changed in the transmission
digital signature shortens transaction information to a fixed length string through digital digest technology. For example, when Niuniu initiates a bitcoin transfer, it needs to first digest the transaction into a string, and then encrypt the digest with its own private key to form a digital signature. After the completion, Niuniu needs to broadcast the original (transaction information) and digital signature to the miner, and the miner uses Niuniu's public key for verification. If the verification is successful, it means that the transaction is indeed sent by Niuniu, and the information has not been changed
at the same time, the private key encrypted by digital signature is inconsistent with the public key decrypted by digital signature, so asymmetric encryption technology is adopted. It looks so complicated. In fact, you only need to input the private key to complete the transfer instantly!

3. The digital signature in bitcoin is generated by the initiator in the transaction. In order to ensure that this transaction is initiated by this person, and the data is not tampered with ring transmission. Digital signature is simply a complete transaction information, compressed into a fixed format string by digital digest technology, and then generated a private key by asymmetric encryption technology. The complete transaction information and digital signature are sent to the miner. The miner decrypts the digital signature with the public key of the transaction initiator. If the decryption is successful, the transaction data will be written into the block.

4. Big brands of course more assured, I am playing in the purse

5. Hanging order is the number of orders waiting to be bought and sold behind the five trading prices transmitted from the exchange ring the market trading period. Together with five trading prices, these ten data constitute the most original public data in the whole trading system

6. Brief introction: Sai blockchain (Beijing) Technology Co., Ltd. (Sai blockchain for short) is a high-tech company focusing on enterprise blockchain procts and services. Its business covers instrial blockchain solutions, blockchain cloud services, data blockchain services, etc., and is committed to providing blockchain procts and services for government, financial and other instrial customers, At the same time, it provides services such as notarization, right confirmation, chain transaction and analysis, data security protection of important data assets. Sai blockchain company is the initiator of big data blockchain laboratory and China blockchain application Alliance (Preparatory), and is contributing to the application and popularization of blockchain technology
legal representative: Zhao Gang
time of establishment: June 13, 2016
registered capital: RMB 1 million
Instrial and commercial registration number: 110108021410023
enterprise type: limited liability company (invested or controlled by natural person)
Company address: 01-84, 8th floor, 18 Zhongguancun Street, Haidian District, Beijing

7. Bitcoin, with a 58coin, is cold wallet and multi signature

8. No, multi signature does not accept other currencies