You will find below a set of definitions on Bitcoin, the operation of the Blockchain as well as elements specific to our activity.

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Digital currency created through the use of open source mining software.

This technology makes it possible to reward with bitcoins the encryption and storage of accounting information on a set of computers and servers that have freely adopted the protocol.

The abbreviation commonly used is btc (or xbt, abbreviation used mainly on stock exchanges), mbtc (millibitcoin) = 0.001 bitcoin, μbtc (microbitcoin) = 0.000001 bitcoin, satoshi = 0.00000001 bitcoin.


Open source software for storing encrypted accounting data on a set of computers and servers that have freely adopted the use of this technology.

Its actors pool some or all of their computing and storage powers to confirm registrations.

Mining is the action of using computer power and thus being rewarded with cryptocurrency. There are different "blockchains" whose properties and purposes differ.


This is a simplified definition intended to understand the mechanism.

In order to secure the exchanges, the blockchain adopts asymmetric cryptography where there is a distinction between public and private data.

The public key is one of two components of a wallet allowing the issuer of a cryptocurrency transaction to designate a recipient. It can be shared publicly, through unsecured channels.

In reality, a public key can take the form of a sequence of numbers and letters or a QR code.

Often considered as the equivalent (in the cryptocurrency universe) of a RIB or IBAN for classical currencies.


This is a simplified definition intended to understand the mechanism.

The private key is the component of the wallet that guarantees the integrity of the crypto-currencies contained in the electronic wallet.

The conservation of this key must imperatively be made by making sure to limit its access to the person who can have the token. If a malicious person, managed to access this information, he could steal all the crypto assets of the wallet with the technical impossibility to cancel this operation.

In the current version of the BYKEP interface, users do not have access to the private key, the purpose being to protect them, a possible lack of information on the issues that represent the keys and their storage.

Pending the familiarization of the greatest number with the modalities of use of the cryptocurrency, implying the possible possibility to communicate the private keys of BYKEP wallets, we leave to the confirmed users, wishing to hold their private keys, the possibility to choose freely a wallet provider.

Private key scheme and public key


Cryptocurrency refers to a decentralized payment system that allows funds to be sent via the web without the need of a trusted third party. Cryptography allows these digital assets to benefit from high security, making their counterfeits highly improbable. Since it is not issued by a centralized authority, it is immune to the manipulation or interference of a government.

Also called crypto-active, crypto-currency, token or token. Bitcoin is the best-known crypto-currency, there are many others such as Litecoin, Ripple, Ether ... whose technical characteristics and uses differ.


It designates the code in the format of an alphanumeric suite or a QR code, registered on the Ticket BYKEP.


Success of the cryptographic verification of a transaction giving rise to its registration on the blockchain.


It corresponds to the value of Bitcoin in a fiat currency (fiduciary money having legal tender) in the crypto-asset market. Having no official price, its price can vary from one platform to the other, nevertheless the arbitrage made by several operators allows to quickly find a relative homogeneity of the courses and can be compared to its value in local currency.


Source: LAW 2018-1317 of December 28, 2018 for Finance for 2019 (1) - Article 41

Any digital representation of a value that is not issued or guaranteed by a central bank or a public authority, that is not necessarily attached to a legal tender and that does not have the legal status of a currency but which is accepted by natural or legal persons as a means of exchange and which can be transferred, stored or exchanged electronically in accordance with Article L54-10-1-2 ° of the Monetary and Financial Code. For the moment Crypto-assets available for sale from BYKEP are limited to Bitcoin (BTC).


Online platform, allowing holders of crypto-assets to exchange, sell and convert cryptocurrencies over-the-counter.


It allows you to receive your Bitcoin directly on your application. The chosen price is that of bitcoin at the time of purchase.


The mining costs make it possible to remunerate the people offering, the computer power necessary for the operation of the blockchain.

When requesting a transaction on the blockchain, the fees are defined by the issuer of the order.

The value of these motivates the priority of processing and confirmation on the blockchain. The higher the fees, the more the miners are interested in managing the registration of the transaction.


The hash function (hash: mess, mess, cut and mix) creates a digital fingerprint to quickly identify the initial data.

This function is particularly used in cryptography to quickly recognize files or passwords.

Schematic examples of text hashes


This algorithm would improve the gaps of the blockchain. It offers a better level of security so as not to affect the order of transactions by a single consensus. Indeed minors can affect the order of passage of transactions and create network nodes. It thus improves the speed of transactions of up to 250,000 transactions per second against only 7 transactions per second for Bitcoin.


Acronym of INITIAL CORNER OFFER (initial offer of money) is a method of fundraising in the field of cryptocurrency. Similar to a stock exchange IPO with a major difference, however, residing in the absence of regulation by a central authority.

This process mainly allows the financing of projects related to blockchain technology via cryptocurrency fundraising. The increased volatility of these assets is linked to the embryonic state of the projects, whose potential success is evaluated by the legitimacy and reputation of the members of the technical team combined with the quality of the White Paper.


This is the acronym for Know Your Customer. It usually refers to the process of verifying your identity.


LCB / FT stands for Anti-Money Laundering and Terrorist Financing. AML / CFT is the English equivalent and stands for Anti Money Laundering and Counter Terrorism Financing. The AML / CFT or AML refers to the policy and processes put in place by institutions and companies to address regulatory requirements and the control of the risk of non-compliance.


This payment protocol is an evolutionary version in the Bitcoin blockchain transaction system. It allows a greater speed of exchanges, thus answering a real constraint in the time of validation of the transactions.


As a result of the evolution of barcodes, the QR code contains a pattern intended to be scanned by cameras and can in particular make it possible to send back directly to a bitcoin address.


Activity providing the basis of the ecosystem whose process simultaneously makes it possible to produce cryptocurrency, to secure the network and to provide the tools making transactions possible and protected.

In the case of bitcoin the mining is done by the supply of computer power. (Proof by work = proof of work).


Fiat-money or fiat-currency refers to fiduciary money being produced by a state. It is the latter who, assisted by the central bank, issues this currency.

The state promises that the currency will retain its purchasing power. But if this obligation is consciously acquired, it is not noted in any law.

Currency fiat comes in two distinct forms: fiduciary money and scriptural money. Fiduciary money is coins and notes. Scriptural money is a currency that "circulates by simple writing game " like the one on your bank account.


Rainblocks is a crypto currency, called without tax. It has the particularity of generating no transaction fees. It uses a structure of braided blocks, that is to say that each user account has a chain and is the only one to be able to validate it. It responds to a need for everyday use by its speed of transaction and its absence of fees charged for each transaction.


The smallest possible fraction of bitcoin corresponding to 0.00000001 (10-8) bitcoin. She was named so, in tribute to Satoshi Nakamoto, the creator of bitcoin.


Refers to the storage conditions of the private key, which in this case is kept on a support not connected to the Internet. Indeed, given the total access to possible operations from the wallet and their permanent character by the holder of this key, its storage is from the outset a major issue.

Storage solutions of this on devices similar to a USB key are commonly used (often called LEDGER in reference to the leading brand in this market).

Some opt for printing this code on paper or any other physical medium that is subsequently secured in a safe or other means to preserve the physical integrity of this data.


Tool for locating BYKEP's partner stores, offering the opportunity to purchase Bitcoin through the BYKEP ticket or Direct Bitcoin service.


The BYKEP ticket allows you to buy Bitcoin with the most convenient time to convert your euros into your favorite cryptocurrency. The value of the Bitcoin retained is that of the moment when the ticket is scanned or the PIN entered in the BYKEP application (or the web interface).


This is the acronym for Intelligence Processing and Action against Clandestine Financial Circuits. For the purposes of Article L. 561-23 of the Monetary and Financial Code, it designates the department of the Ministry of the Economy and Finance from which suspicious transaction reports are filed under the anti-counterfeiting regulations. money laundering and terrorist financing.


The TXID stands for Transaction Identity. This identifier is a reflection of the transparency of operations on the blockchain. It allows to consult the status of a transaction and to check whether its registration is in progress or completed.


Digital wallet for cryptocurrency storage. A wallet can store only one type of crypto-currency, so it is necessary to create a wallet for each cryptocurrency that the user wishes to hold.

There is no compatibility between wallets of different cryptocurrencies.

The similar format of the wallet addresses does not make it possible to identify the type of asset for which the wallet was created, therefore a vigilance is necessary during the transfers to make sure of the compatibility of the wallet and the Token.

The BYKEP account will soon offer the possibility of hosting several wallet (Multi-wallet account).

Cryptocurrency Wallet Diagram

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