A kind of atomic nucleus cryptographic system and direct communication method and indirect communication method

Abstract

The invention mainly discloses an atomic nucleus type cryptographic system. (1) In each password table, except for the Dc-level node, other nodes can directly fission into several nodes; (2) When encrypting, the character group arranged from left to right in a certain plaintext character segment, and There is a one-to-one correspondence (mapping) between the relevant nodes from the dc level to the d′c level in a certain password table, and the dc level node must be directly fissioned by the (dc-1) level node; (3) Because the node mapped to the last character group in the certain plaintext character segment corresponds to the cipher character group EEEEE, the certain plaintext character segment is encrypted into EEEEE by leaving tail and fusion. The present invention also includes a bit calculation method, a method of dynamically selecting a password table, a method of hiding ciphertext character groups, and a method of creating a matching character system. The invention has high security and good versatility, and is beneficial for encrypting all contents in electronic payment, text communication, and even video and audio.

Description

technical field [0001] The present invention relates to a cryptographic system, in particular to a nuclear cryptographic system similar to symmetric cryptographic system, and a direct communication method and an indirect communication method based on the nuclear cryptographic system. Background technique [0002] Ciphers are mainly divided into symmetric ciphers and asymmetric ciphers. Symmetric ciphers, such as permutation ciphers and substitution ciphers (substitution ciphers) in classical ciphers, such as block ciphers (DES, AES, etc.) or sequence ciphers (RC4, etc.); symmetric ciphers are suitable for long and short texts, but have shortcomings; for example , the block cipher or sequence cipher needs to be calculated, and the sequence cipher is not sensitive to insertion and modification. text will also be repeated) and ciphertext content is easy to be replaced, rearranged, deleted, replayed; key), use a fixed mapping for all letters in the plaintext, and make the freq...

AI Technical Summary

Problems solved by technology

Symmetric ciphers, such as permutation ciphers and substitution ciphers (substitution ciphers) in classical ciphers, such as block ciphers (DES, AES, etc.) or sequence ciphers (RC4, etc.); symmetric ciphers are suitable for long and short texts, but have shortcomings; for example , the block cipher or sequence cipher needs to be calculated, and the sequence cipher is not sensitive to insertion and modification. text will also be repeated) and ciphertext content is easy to be replaced, rearranged, deleted, replayed; key), use a fixed mapping for all letters in the plaintext, and make the frequency distribution of single letters appear the same as in the ciphertext, which is difficult to resist frequency analysis; for example, Vernam password (one-time pad password, which belongs to the alternative password Multi-table substitution ciphers), there is the problem that the same key is used repeatedly to encrypt different plaintexts and it is easy to be cracked; therefore, in general, relatively speaking, at least the security of symmetric ciphers is not high enough

[0003] At present, some consumers use the public key encryption algorithm (RSA, which belongs to asymmetric encryption, and is used for various USBKeys, such as U-Shield), when conducting online bank settlement in China, but: (1) USBKey is only suitable for short text with small data , because the key length of RSA is 1024 bits or 2048 bits, so the calculation amount of long text is large; (2) it is not universal, for example, a USB shield only corresponds to one desktop computer; (3) it is often attacked by Trojan horse virus Threats, such as U-shields that are not unplugged in time after use, may be remotely controlled by hackers and transferred online; (4) When RSA and symmetric cryptography are used in combination (for example, the private key in the RSA algorithm is used for digital signatures of symmetric cryptography), require that the symmetric cipher be changed frequently

[0004] Because of the deficiencies in the asymmetric cipher, there are still a huge number of consumers who use symmetric ciphers or do not use ciphers: (1) use symmetric, static identity passwords (such as passbook passwords, bank card passwords, online passwords, unlock password, etc.), but the identity password can only indicate the identity of the consumer, and cannot prevent the real transaction content between the consumer and the financial institution from being tampered with (such as tampering with the receiving account), or cannot prevent the consumer from being tampered with. The true will is violated (for example, the unlock password is peeped or stolen), not to mention that the identity password is often illegally peeped or stolen at the ATM or POS machine or on the Internet because it is static (that is, relatively unchanged)

(2) When conducting online banking settlement, some consumers use symmetrical dynamic passwords, but the security and convenience are not very satisfactory; some consumers use symmetrical SMS verification codes, but are vulnerable to peeping or interception by mobile phone viruses and was stolen

(3) The phone calls, QQ communication, WeChat, mobile phone text messages, scanning QR codes that ordinary consumers often make, or online business contacts between enterprises, or information stored by users on communication terminals that can access the Internet, etc., generally They are all in plain text, without encryption (no password is used), and the consequences are: (1) easy to be peeped or tampered with; (2) scanning a QR code with a virus and going to a "phishing" website; (3) vulnerable to fake "Phishing" or advertising harassment of base stations (pseudo base stations send cell phone text messages to specific or non-specific people); Friends or relatives of consumers or state agencies or public utilities, in order to deceive consumers and send money or provide bank card passwords

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