合同 区块链,区块链合约模式app开发

近年来，随着区块链技术的发展，合约模式的应用也日益广泛。区块链合约模式APP的开发，不仅可以极大的提高合同的可信度，而且能够极大的提高签署合同的效率。

首先，区块链合约模式APP的开发可以极大的提高合同的可信度。区块链技术的应用，使得记录的合同信息无法篡改，可以有效的防止合同被篡改或者被伪造，从而使得合同的可信度极大的提高。

其次，区块链合约模式APP的开发能够极大的提高签署合同的效率。传统的合同签署需要双方到场，而区块链合约模式APP的开发，可以使得双方可以在网络上进行签署，使得签署的效率大大提高。

此外，区块链合约模式APP的开发还可以极大的降低签署合同的成本。传统的合同签署需要双方到场，而区块链合约模式APP的开发，可以使得双方可以在网络上进行签署，从而大大降低签署合同的成本。

总之，区块链合约模式APP的开发，可以极大的提高合同的可信度，而且能够极大的提高签署合同的效率，以及降低签署合同的成本。因此，区块链合约模式APP的开发受到了广大企业的青睐，可以说是一个受益匪浅的发展方向。

⑴ Is the electronic contract reliable? Is the e-Sign Bao electronic contract easy to tamper with?

Electronic contracts are relatively reliable. I have used them several times before when signing cooperation, and generally Third-party electronic contract platforms are registered and supervised by multiple parties. The data is not easily tampered with. The signed contracts are also protected by law and have legal effect. Moreover, many platforms now also use blockchain technology for the entire process. Electronic signatures have certificate storage services through notary offices and forensic identification centers. It is also very convenient to check later after signing. At present, the third-party electronic contract platforms that I have used, the better ones include e-signing, Fada, and signing. You can directly search for these platforms online and go to the official website to learn more.

⑵ Is the e-signing electronic contract safe?

Safe.

In the final analysis, the security of electronic contracts is to ensure the true identity of each electronic contract (the identities of the signing parties are true and valid), the true wishes (the signed contract is the true expression of the wishes of both parties), and the confidentiality of the entire process (all The signature information is encrypted and transmitted), and the original text remains unchanged (the contract content and signing events are tamper-proof). These four layers cover the entire cancellation process of electronic contract signing.

Many core technologies for signing electronic contracts are precisely to ensure the safety and effectiveness of these four aspects.
①Real-name verification
Identity real-name verification includes two elements of the Ministry of Public Security, three elements of mobile phone number, three or four elements of bank card, face recognition, two elements of enterprise, three elements of legal person/agent, etc. Covering units and individuals Multi-faceted verification of valid identity information.
And combined with mobile phone text messages, email and other methods to comprehensively guarantee the true identity and true wishes of both parties signing.

②Encrypted transmission
RSA encryption algorithm performs asymmetric encrypted transmission of electronic contract data (identity information, electronic signature/chapter information, contract content), and uses a hash algorithm to verify whether the data matches before and after transmission .
In this process, the authoritative CA organization issues a CA certificate to ensure that the transmitted data (identity information, electronic signature/stamp information, public key information, etc.) is safe and trustworthy. The private key is randomly generated from a 1024-bit garbled code, and the probability of deciphering it is zero.
Time stamp solidification technology, the National Timing Center of the Chinese Academy of Sciences conducts timing and punctuality testing on the creation process of each electronic contract. Once traces of modification are detected, the contract signature will be deemed invalid, thereby ensuring the time accuracy and uniqueness in the timestamp certificate.
During the entire transmission process, attacks and tampering with instructions at any stage will cause the hash value to change. If the timestamp certificate detects traces of the change, the contract will be deemed invalid and invalid, and an error will be reported when opening the contract. This ensures that the electronic contract is secure and confidential during the entire process of identity verification - contract initiation - transmission - signing, and cannot be tampered with.

③Blockchain encryption certificate storage
Blockchain certificate storage, distributed multi-point certificate storage for each data information of an electronic contract signed with confidence.
And the entire backup storage process uses AES256 encryption (currently using National Secret SM2) technology, completes information encryption and storage through 14 rounds of encryption operations such as byte substitution, row displacement, column obfuscation, round key addition and expansion of the original key when necessary. And combined with the digital fingerprint information in the Ministry of Public Security system, a credible electronic contract signing evidence chain is generated in one second. When the user needs it, a contract notarization certificate will be issued after being reviewed by the notary office.

Ensure that electronic contracts, as electronic evidence, are not only safe and confidential, but can also protect the legitimate rights and interests of both parties to the signing in a timely and effective manner.

⑶ What is the e-sign treasure electronic official seal

Electronic seal

According to the provisions of Article 15, Paragraph 2 of the "Several Provisions of the State Council on Online Government Services" :

An electronic seal refers to a seal that generates an identity based on trusted cryptographic technology and is represented by electronic data graphics.

The identity generated based on trusted cryptographic technology is a digital certificate, which is a certification document issued by a state-authorized CA agency. To verify the signature of an electronic contract, you can quickly determine whether the digital certificate in the electronic seal has been tampered with online.

Therefore, electronic seal images that are photographed, scanned, and photoshopped are not legally binding. A valid electronic seal is composed of a graphical seal displayed on the front end and a back-end CA digital certificate.

A valid electronic seal

e-Shanbao electronic seal

e-Shanbao electronic seal is based on AI technology , electronic contract products created with blockchain and other technologies. A series of technical means such as original text sandbox confidentiality technology, summary algorithm, and sharded storage are adopted to achieve the solidification of user identity information, signed content, and signing time during the signing process to avoid tampering and other behaviors.

Specifically, the eSignBao blockchain contract synchronizes a complete set of user signing behaviors to the Ant blockchain in real time. Every action is immediately witnessed by each node of the blockchain as soon as it occurs. At that time, Who signed, what was signed, and the step-by-step operation are permanently fixed, and can be traced and verified, making the possibility of electronic contracts and electronic seals being tampered with close to zero.

In addition, e-Sign Bao can also manage the seals of the headquarters and branches/subsidiaries online in a unified manner, strictly restricting the permissions of various roles such as administrators, seal users, approvers, etc., and all seal use processes are It can be recorded and traced, which facilitates subsequent accountability and solves the long-standing problem of corporate seal management.

⑷ Compared with Fadada, e-signing, Shangshangshu, Cloud Contract, and Cloud-Signing, how about Uban’s electronic contract?

These electronic contract systems can all help Users can sign contracts online to help users improve efficiency. But the biggest difference is that Fada, eSignBao, ShangShangShou, Cloud Contract, and CloudSignBao need to develop their own systems before they can be used, while YouBan can be used directly. From this point of view, YouBan is more convenient.