With the continuous development of modern technology, large file transfer has become an indispensable part of daily work. However, the security problem of large file transfer is becoming more and more prominent, so encryption and security measures are very important to protect the security of large file transfer.

Cryptography

Cryptography is the foundation of encryption and security measures,convert scanned pdf to word online free large files which mainly includes the following contents.

1. Symmetric cryptography

Symmetric cryptography means that in the encryption and decryption process, encryption and decryption operations can be performed using the same cryptographic algorithm. This means that the sender and receiver must share a key. The advantage of this encryption processing method is that it lies in the speed and simplicity of the computation process, and therefore needs to be used frequently to secure large files. However, since the key must be shared, the protected data gets completely exposed to each other when the key is breached, so teachers should choose to use it more carefully.

2. Asymmetric Cryptography

Asymmetric cryptography is the use of different cryptographic algorithms in the encryption and decryption process. The sender encrypts the data using a public key and the receiver decrypts the data using a private key. The advantage of this type of encryption is that it is highly secure and can effectively avoid the risk of key leakage. The disadvantage is that it is slow, complex, and not suitable for encrypting large files.

3. Hash function

Hash function is a function that converts input information data of arbitrary length into output data of fixed length. It can be encrypted to protect these data technology, and can be based on the actual output results we can get to verify the data in the transmission process of their own whether they have been tampered with. Hash function has many applications, such as verifying file integrity and digital signatures.

the encryption method in large file transfer

1. SSL/TLS

SSL/TLS is a widely used secure transmission protocol, which can encrypt the transmitted data at the transmission layer.SSL/TLS encryption adopts a combination of public and private keys to realize encrypted communication through asymmetric cryptography.SSL/TLS protocol has the advantages of high reliability, good security, and high scalability, and has been widely used in large file transmission.

2.IPSec

IPSec is a security protocol used to protect network communications by encrypting data transmitted at the network layer. ipsec can provide end-to-end encryption between the source and destination endpoints for end-to-end data protection. At the same time, IPSec can control access to network resources through access control lists and port filtering to realize complete security protection.

Security Measures in Large File Transmission

1. Password security

Using password protection in large file transfer we can effectively guarantee the security of data. Passwords should be of sufficient complexity and length, while the need to regularly change the password is also a very important.

2. Data encryption

In order to encrypt data during the transmission of large files, symmetric or public key encryption encryption algorithms can be used. Encrypted data cannot be easily stolen by malicious users, which helps to improve the security of data transmission.

3. Secure Transmission Protocol

It is also very important to use communication protocols to transmit files securely. Secure transmission protocols such as SSL/TLS and IPSec mentioned above can ensure data security during large file transfer.

4. Access Control

Access control is a technology that restricts users from accessing files. Access to network resources is controlled through methods such as access control lists and port filtering to achieve good security protection.

In conclusion, encryption and security measures are very important in large file transfer, and proper encryption and security measures can effectively ensure data security. At the same time, passwords should be changed regularly, data should be backed up periodically, and access control should be set. Through the implementation of these measures, the security of large file transfer will be fully guaranteed.