Digital signature includes original text, public key certificate and signature value (i.e. encrypted hash).
Question 2: What does the complete information of digital signature include? Digital signature of software code is a method to mark files electronically through information. At this point, the file will be digitally signed by the creator (publisher). A valid digital signature will contain the following two points of the file:
1) Issuer name;
2) The file has not been changed since it was signed. Any tampering will invalidate the signature.
The digital signature of the software code will:
* Allows you to verify the publisher of the document.
* Confirm that the file has not been changed since it was digitally signed.
Any software developer can apply for software code signing certificate from a certificate authority (such as WoSign) in the trusted root certificate authority in IE browser and sign the code.
Question 3: What does a digital signature include? digital signature
The so-called digital signature is to generate a series of symbols and codes through some cryptographic operation to form an electronic password for signature, rather than writing a signature or seal. This kind of electronic signature can also be technically verified, and its verification accuracy is incomparable to that of ordinary manual signature and stamp verification. Digital signature is one of the most widely used, mature and operable electronic signature methods in e-commerce and e-government. It uses standardized procedures and scientific methods to identify signers and approve electronic data content. It can also verify whether the original text of the file has changed during transmission, and ensure the integrity, authenticity and non-repudiation of the transmitted electronic file.
In ISO7498-2 standard, digital signature is defined as: some data attached to a data unit, or cryptographic transformation of the data unit, which allows the receiver of the data unit to confirm the source and integrity of the data unit and protect the data from being forged by people (such as the receiver). The definition of digital signature in American Electronic Signature Standard (DSS, FIPS 186-2) is that data is calculated by using a set of rules and a parameter, and the identity of the signer and the integrity of the data can be confirmed by this result. According to the above definition, PKI (Public Key in Rastrucino Public Key Infrastructure) provides the password conversion of data units, and enables the receiver to judge the data source and verify the data.
The core executing agency of PKI is the electronic certification service provider, commonly known as CA(Certificate Authority), and the core element of PKI signature is the digital certificate issued by CA. The PKI services it provides are authentication, data integrity, data confidentiality and non-repudiation. The method is to encrypt/decrypt by using the certificate public key and its corresponding private key to generate the signature and verification signature of the digital message. Digital signature is the use of public key cryptography and other cryptographic algorithms to generate a series of symbols and codes, forming an electronic password for signature, rather than writing signatures and seals; This kind of electronic signature is also technically verifiable, and its verification accuracy is incomparable with manual signature and stamp verification in the physical world. This signature method can be used for authentication in a large number of trusted PKI domains or multiple trusted PKI domains, especially for security authentication and transmission on the Internet and WAN.
The biggest difference between "digital signature" and ordinary text signature is that it can use graphic files with distinctive personality. You can use a scanner or drawing tool to make your signature, seal and even photos into BMP files as the material of "digital signature".
Question 4: What is the definition of digital signature? Simply put, the so-called digital signature is some data attached to a data unit, or a cryptographic transformation of a data unit. This kind of data or transformation allows the receiver of the data unit to confirm the source and integrity of the data unit, and protects the data from being forged by people (such as the receiver). This is a method of signing an electronic message, and the signed message can be transmitted in a communication network. Digital signature can be obtained based on both public key cryptosystem and private key cryptosystem. At present, digital signature is mainly based on public key cryptosystem. Include general digital signature and special digital signature. Common digital signature algorithms include RSA, ElGamal, Fiat-Shamir, Guillou-Quisqour, Schnorr, Ong-Schnorr-Shamir, Des/DSA, elliptic curve digital signature algorithm and finite automaton digital signature algorithm. Special digital signatures include blind signature, proxy signature, group signature, undeniable signature, fair blind signature, threshold signature, signature with message recovery function and so on. It is closely related to the specific application environment. Obviously, the application of digital signature involves legal issues, and the United States has also formulated its own digital signature standard (DSS) based on the discrete logarithm problem over finite fields.
Digital signature technology is a typical application of asymmetric encryption algorithm. The application process of digital signature is that the sender of the data source encrypts the data checksum or other variables related to the data content with his own private key to complete the legal "signature" of the data, and the receiver of the data interprets the received "digital signature" with the public key of the other party, and uses the interpretation result to check the integrity of the data to confirm the legality of the signature. Digital signature technology is an important technology to confirm identity in the virtual environment of network system, which can completely replace the "autograph" in the real process and get technical and legal protection. In the management of public and private keys, the application of digital signature is just the opposite of PGP technology for encrypting emails. In the application of digital signature, the sender's public key is easy to obtain, but his private key needs to be kept strictly confidential.
The main functions of digital signature are: to ensure the integrity of information transmission, to authenticate the identity of the sender, and to prevent denial in transactions.
Digital signature technology encrypts abstract information with the sender's private key and sends it to the receiver together with the original text. The receiver can decrypt the encrypted digest information only with the sent public key, and then generate the digest information for the received original text with a hash function, and compare it with the decrypted digest information. If they are the same, it means that the received information is complete and has not been modified during transmission, otherwise it means that the information has been modified, so the digital signature can verify the integrity of the information.
Question 5: What does a digital signature include? Digital signature technology encrypts abstract information with the sender's private key and sends it to the receiver together with the original text.
Digital signature includes original text, public key certificate and signature value (i.e. encrypted hash).
Question 6: What are the functions and functions of digital signature? Function: ① The receiver can verify the sender's signature on the message.
② The sender cannot deny the signature of the message afterwards:
No one can forge the signature of the message;
(4) Ensure the integrity of data and prevent interceptors from adding other information in the file;
⑤ Ensure the compensation source of data and information and the identity of the sender;
⑥ Digital signature has a certain signature speed, which can meet all application requirements.
Question 7: What is the function of digital signature? A digital signature is used to verify a person's identity. When each certificate issued by an accredited CA is unique and supported by law.
Question 8: What is a digital signature in software? 1. A digital signature consists of a digital certificate.
2. Digital certificates are issued by CA certificates.
3. There are many 3.CA certification bodies, but only some foreign ones are trusted by windows operating system.
4. At present, there are many foreign CA certification bodies used in China, such as verify and entrust.
5.verify has many institutions in China, such as Tianwei Integrity. You can search Baidu for "verification" or "Tianwei Integrity".