What Are Self-Destructing Messages and How They Work


Self-destructing messages are a type of message authentication and integrity (MAC) mechanism, where the originator randomly chooses a secret encryption key and transmits it to the recipient. The recipient uses the key to verify that the sender is legitimate, but cannot use it again for any other transmission. The receiver then deletes its copy of this key when done with transmitting them.

This blog post discusses how self-destructing messages work and why they are used in today’s modern society.

How Do Self-Destructing Messages Work?

The sender encrypts a small block of data that is then encrypted separately with the encryption key. The result is a message that is composed of two parts: the original encrypted data, and the key used in the encryption process. This original data and key are appended to a привнот message. The encrypted bitmap is appended to the end of this message, producing an output message using both the original data and key.

The receiver checks the legitimacy of the message by decrypting it with the key. The recipient can then use this key as a secret input to verify that the decrypted message is valid. The encryption of this data is not reversible, making it impossible for any third party to read it.

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Why Are Self-Destructing Messages Used?

Self-destructing messages are commonly used to provide confidentiality, integrity and authenticity to information sent via email, messaging services, and other communication channels. They are closely related to the use of digital signatures and non-repudiation. Digital signatures provide authenticity and non-repudiation, while self-destructing messages provide confidentiality, integrity, and authenticity.

Self-destructing messages can be used to provide confidentiality by ensuring that recipients cannot read the message after a certain time period. This helps prevent confidential information from being intercepted or modified by determined adversaries.

Self-destructing messages also provide integrity by ensuring that the data cannot be modified or forged. Thus, if a message is sent from one party to another, it can be verified that the data has not been tampered with, and it came from the source that is claiming to have sent it.

Advantages and Disadvantages Of Self-Destructing Messages

The greatest advantage of self-destroying messages is that they provide confidentiality and integrity for messages. If the message is not destroyed, then it can be read by its intended recipient, which could lead to unintended consequences.

Also, self-destructing messages are slower than regular messages. This is a noticeable problem when sending large amounts of data. Another disadvantage is that they do not verify that the message was actually sent by the original source in the first place.

September 2022