What can be done with encrypted communication?

1. Encrypted call function: 1. Ordinary call to encrypted call: between encrypted communication service users (both parties need to handle it), first establish an ordinary (plaintext) call, and then after verbal negotiation, establish an encrypted call by pressing the encrypted call button or menu on the encrypted communication terminal.

2. Directly initiate a confidential call: When the caller knows that the called party has an encrypted terminal, it selects an encrypted call when calling to initiate an encrypted call, and the called party directly answers, without pressing the encrypted call button, and automatically establishes an end-to-end encrypted call. 2. Information security protection function:

1. Security settings: The customer sets the security mode for the mobile phone, and in this mode, sets the encrypted contact and the password of the security mode. Encrypted contact information is hidden in normal mode and visible in safe mode.

2. Password reset: After the user forgets or enters the wrong password in the security mode for 5 consecutive times and the terminal is locked, he can apply to Telecom for remote password reset, and the KMC platform will reset the password to the default value by sending instructions remotely. 3. Lost mobile phone information protection:

When the mobile phone is stolen or lost, in order to prevent the leakage of privacy information in the terminal, the customer can apply to China Telecom for the protection of lost mobile phone information, as long as the mobile phone is turned on and connected to the network, the encrypted contacts and other private information in the mobile phone can be remotely erased. To learn more about service offers, click on the "****" customer service 95 below to answer for you.

Encrypted communication refers to the end-to-end encrypted communication service in two modes when both parties use encrypted communication terminals and enable encrypted communication services.

Method: 1. Convert ordinary calls to encrypted calls: Ordinary calls are established between encrypted communication service users, and then encrypted calls are established by pressing the encrypted call button or menu on the encrypted communication terminal after verbal negotiation.

2. Directly initiate the secret talk: The caller chooses the encrypted call when calling the encrypted terminal when the callee is known to have an encrypted terminal, and initiates an encrypted call, and the called party directly answers, without pressing the encrypted call button, and automatically establishes an end-to-end encrypted call.

In encrypted communication, it is important to ensure the security and real-time nature of the key. While there is no one physical quantity or convention that absolutely satisfies all of the conditions you mention, there are ways to get close to satisfying your needs:

1.Secure Clock Synchronization: Both parties use a secure clock provided by a trusted third party for synchronization. This clock can guarantee accuracy and expiration as a timestamp for the key. However, this approach relies on third-party reliability.

2.Quantum key distribution: By using the principles of quantum physics, two parties can generate and share a uniquely destroyed set of cryptographic keys that cannot be stolen or copied in transit.

Although quantum key distribution can provide a high level of security, it requires the use of specialized quantum devices and infrastructure.

It is important to note that real-time, expiration, and irreversibility are often contradictory in key exchanges. In general, ensuring the security and up-to-date performance of keys requires a combination of security measures such as key exchange protocols, encryption algorithms, and key management policies. These measures provide more reliable protection, ensure that only authorized parties have access to legitimate keys, and protect the security of communications.

In encrypted communication, choosing the right key is an important part of the very code Bi, because the key is the key to ensure the security of the communication. Here are some steps and considerations for choosing a key:

Determine the key length: The longer the key length, the more secure it is. Generally speaking, the key length commonly used nowadays is 128 bits or 256 bits.

Choose the right algorithm: Different encryption algorithms use different key lengths and algorithm flows. It is important to choose an algorithm with high security and fast efficiency.

Key generation: The key should be a random number, the more random the better. Cryptographically secure random number generators are often used to generate keys.

Distribution of keys: The distribution of keys must be secure to prevent them from being obtained by attackers. Keys are typically distributed using a secure key exchange protocol.

Key storage: Keys should be stored securely to prevent them from being accessed by attackers. Cryptographically secure storage devices or servers are often used to store keys.

In conclusion, choosing the right key is critical to the security of encrypted communications. Keys should be selected for appropriate length, use secure algorithms, be generated with a random number generator, distributed using a secure key exchange protocol, and stored securely.

In the era of mobile communication, can mobile communication enjoy the treatment of "encrypted communication"? The answer is yes. As early as 2014, when Apple's mobile phone was exposed to information security vulnerabilities, civil servants in Shanghai and other places began to replace domestic encrypted mobile phones to avoid the risk of information leakage.

At present, more than 30,000 ** organs at all levels in Shanghai have opened "encrypted communication" services. Encrypted communication mainly refers to the service that operators and mobile phone manufacturers jointly customize for users, use security technology to provide confidential call encryption, and provide mobile phone personal information protection and mobile phone loss security protection.

The increasing popularity of encrypted communication has made many users abandon brands such as Apple and Samsung, and turn their attention to domestic mobile phones again, which also makes domestic mobile phone manufacturers regain confidence. At present, more than 10 encrypted mobile phones launched by domestic brands such as Coolpad, Huawei, ZTE, and Hisense have passed the certification of the State Cryptography Administration. Due to the technical characteristics, among the three major operators, China Telecom is the only operator in China that has been approved for commercial encrypted communication services, and its core encryption algorithm is also specified by the State Cryptography Administration.

Compared with ordinary encryption methods, 'encrypted communication' adopts end-to-end encryption technology, one word and one encryption, and the voice is transmitted in ciphertext between terminals, air interfaces and networks, making it difficult for calls to be eavesdropped. According to the relevant personnel of China Telecom, in the process of use, in addition to starting the encrypted call mode to avoid information theft, users can also protect mobile phone information by turning on the security mode and setting a security password.

If you've seen the 007 series of movies, you'll definitely be impressed by the scene where the protagonist Bond takes on a mission: after receiving a mission, both the tape and the public phone booth will be automatically destroyed. It is understood that some high-end encrypted mobile phones also have this powerful function, after turning on the burn-in-the-moment mode, once the text message is read, it will be directly damaged in an instant, and it can no longer be seen.

The SMS is sent by BCC, which cannot be intercepted even by the pseudo base station; After the mobile phone is lost, if it is turned on directly, it can remotely locate the location and obtain the user's **......Of course, encrypted communication is not zero, if users want to enjoy encrypted communication, both parties must be China Telecom Tianyi CDMA network users, and both must use encrypted mobile phones, and enable the encryption function.

The encrypted communication service is based on China Telecom's wide-coverage, large-capacity CDMA mobile communication network and security management platform, and is specially customized for customers through China Telecom.

The special mobile phone terminal with the built-in encryption algorithm assigned by the State Cryptography Administration uses commercial cryptography technology and information security technology to provide customers with security services such as end-to-end mobile phone call encryption and terminal-based personal information protection and lost mobile phone security protection.

Encrypted communication services include encrypted call function and information security protection function.

The following table describes the functions

Based on China Telecom's wide-coverage, large-capacity CDMA mobile communication network and security management platform, China Telecom's encrypted communication business provides customers with end-to-end mobile phone voice communication encryption functions, mobile terminal information protection and remote erasure of mobile phone terminal encrypted information through China Telecom's specially customized mobile phone terminals with built-in encryption algorithms assigned by the State Cryptography Administration, and uses commercial cryptography technology and information security technology to provide customers with end-to-end mobile phone voice communication encryption functions, mobile terminal information protection and remote erasure of mobile phone terminal encrypted information.

Did you know soon after using data encryption software? Basically, it is all functions such as state and authority management, mandatory Zhihui encryption, and sail approval and decryption. You can use the redline data encryption software under the experience.

Linux system solutions for the above functions: OpenSSL (SSL) and GPG (PGP).

GPG is the implementation of the GPG protocol, and OpenSSL is the implementation of the SSL protocol and encryption library

The same key is used for encryption and decryption.

Features:

Defects:

The key is divided into the public key and the private key paired with it.

Usage:

Algorithm:

That is, the data fingerprint is proposed, which can only be encrypted and cannot be decrypted.

Features:

Fixed-length output: The amount of data extracted is fixed-length, regardless of the amount of data to be encrypted.

Avalanche effect: A small change in the initial recognition condition can cause a large change in the cryptographic results.

Function: Used to verify data integrity

Algorithm:

Note: MD5 is used for password encryption for CentOS 5 users, and SHA512 is used for password encryption for CentOS 6 7 users

In order to unify the format of digital certificates, the International Telecommunication Union (ITU-T) has developed a digital certificate standard, that is, the format of digital certificates follows the standard. In the version, the structure of the socks digital certificate and the certification protocol standard are determined.

Basic process:

This blog reference.