Instructions for Use
1. Local Temporary History: Displays the last generated result on the current page. Disabling this feature and regenerating, or refreshing the page, will keep only the latest result and clear all previous records. In this mode, you can review up to 255 previous generation records.
2. Process Line by Line: Each line of input (ignoring blank lines) is processed separately and output as an independent record. For example, if three different lines are input, the system will generate and display a record for each line. In this mode, up to 256 records can be generated.
3. Export: Supports export in txt, csv, xls, and xlsx formats (txt export note: When plaintext data contains new line characters (\r\n, \n, \r), to ensure consistency, all new line characters will be replaced with the ↵ symbol. Here, \r\n is for Windows systems, \n is for Linux and Unix systems, and \r is for older Mac systems.)
Example
Enter the following content:
123456
Click the generate button to produce:
7c4a8d09ca3762af61e59520943dc26494f8941b
About SHA-1 Hash Generator
This SHA-1 Hash Generator online is designed specifically for text strings, rapidly computing and producing precise SHA-1 hash values to encrypt and secure your data.
Note: SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function intended to take an input and produce a 160-bit hash value, forming a digital fingerprint. Different inputs (even minor variations) result in different outputs. Developed by the NSA and released as a Federal Information Processing Standard (FIPS PUB 180-1) in 1995, it replaced the earlier SHA-0 algorithm.
• Features
Fixed output length: SHA-1 produces a 160-bit (20-byte) hash value regardless of the data size.
High sensitivity: Minor changes in input data result in significant differences in the output hash value.
Irreversibility: It is not feasible to derive original data from its hash value as hash functions are one-way.
Collision resistance: While an ideal hash function should make it extremely difficult to find two different inputs that produce the same output hash, collision attacks have been discovered for SHA-1, showing its vulnerability.
• Use Cases
Despite questions about its security that emerged in the early 21st century, SHA-1 was widely used in various security applications and protocols, including:
Digital certificates: SHA-1 was used in TLS and SSL protocols to issue certificates for websites, facilitating encrypted connections. Modern practices have moved to more secure algorithms, such as SHA-256.
Software distribution: Developers used SHA-1 to hash software, allowing users to verify that their downloaded files have not been tampered with.
Version control systems: Tools like Git use SHA-1 to uniquely identify commits and file states. Although known theoretical vulnerabilities exist, it is still considered secure enough for practical use.
Cryptographic research: SHA-1 has been a focal point for researchers seeking potential weaknesses, advancing encryption technology.