The digital currency used for electronic transactions is known as cryptocurrency or bitcoin. Bitcoin is not used for a single institution or single person. It is a peer to peer transaction or centralization. The bitcoins are created only in the limited process. So twenty one billion coins only printed. Bitcoin is a peer to peer process no other mediators in between them. Bitcoin was introduced by the unknown programmers under the pseudonym Satoshi Nakamoto in the year 2009. First of all the bitcoin source was introduced as open-source software. Bitcoin is coined for the process of awarding. Bitcoin can be exchanged for other currencies and other services. The collection of bitcoin addresses is known as a bitcoin wallet.  For password recovery try in various ways according to the level of wallet. The bitcoin wallet is in various forms like online service, desktop, and mobile apps, even in the paper. According to the levels of wallets, the security source is provided.

Cryptocurrency wallet:

To transfer the bitcoins the necessary information was stored in the cryptocurrency wallet. The blockchain transaction ledger was inseparable from the bitcoin wallet because it is the nature of the bitcoin wallet. The wallet is used to store the bitcoins or a place to hold the bitcoins.  To store the bitcoin certificates of the bitcoins which were held, for that the wallet is correctly designed. The public key cryptography is used in the bitcoin wallet. There are two types of keys that were created over the cryptographic keys which are known to be the public and private keys. So the wallet is known as the collection of these keys. It has a reverse relationship with the truthlessness and computational needs. By downloading the whole copy of the blockchain, the client can verify the transactions. That is the most secure way of the transaction through the network. To alter or break the network rules, the mined blocks were checked properly for its validity. It is not possible to download and verify the entire blockchain because of its size and complexity for all the devices.

Tangible wallet:

A paper wallet is known as the physical wallet. The private key that is written or printed on the paper and then erased from the computer system is known to the physical wallet on a computer with no internet connection needed. After the retrieval, the physical wallet is stored with proper care in the physical location. In the cold storage, the paper wallet bitcoins are stored. The founders of Gemini trust co. Cameron and Tyler Winklevoss report to cut the bitcoin into pieces and then asked to store in the envelope to keep the bitcoins safer in deposit boxes over the united states. Through this system, only the right owners can use the bitcoins in a transaction. It won’t allow the thief to steal the bitcoins. Metal token coins also used in the physical wallet service with security holograms for security reasons. The bitcoins were produced in base metals and later used with precious metals to improve its popularity. The security holograms were located in the metal token and if it is removed then it would make self-destruction. For offline crediting transactions, the physical wallet also known to be the hardware wallet keeps certified offline.