CryptographyDEV
Text encoding, cryptographic hashing, symmetric & asymmetric encryption.
About Cryptography Toolkit
Overview
This toolkit integrates 20+ industry-standard cryptographic algorithms, covering four major categories: text encoding, cryptographic hashing, symmetric encryption, and asymmetric encryption.
100% Client-Side Processing—
Zero Network Transmission:
All cryptographic operations are performed locally on your device. All sensitive data (plaintext, ciphertext, keys, etc.) never leaves your device, ensuring complete privacy and security.
Select a specific algorithm to view detailed technical documentation, including algorithm history, security analysis, recommended parameters, and professional guidance.
100% Client-Side Processing—
Zero Network Transmission:
All cryptographic operations are performed locally on your device. All sensitive data (plaintext, ciphertext, keys, etc.) never leaves your device, ensuring complete privacy and security.
Select a specific algorithm to view detailed technical documentation, including algorithm history, security analysis, recommended parameters, and professional guidance.
SHA-1
SHA-1 (Secure Hash Algorithm 1) was designed by the NSA and published in 1995, producing 160-bit (20-byte) hash values. It was once central to TLS, Git, and digital signature systems.
Security Issues: Cryptographers began discovering theoretical weaknesses in 2005. In 2017, Google demonstrated a practical collision attack (SHAttered), proving SHA-1 is no longer secure.
Why Avoid: SHA-1 collision attacks are now feasible, and major browsers have stopped trusting SHA-1 certificates. While systems like Git still use it, they're migrating to SHA-256. Avoid SHA-1 in all new security applications.
Current Status: Use only when legacy compatibility is required; new projects should adopt SHA-256 or stronger alternatives.
Security Issues: Cryptographers began discovering theoretical weaknesses in 2005. In 2017, Google demonstrated a practical collision attack (SHAttered), proving SHA-1 is no longer secure.
Why Avoid: SHA-1 collision attacks are now feasible, and major browsers have stopped trusting SHA-1 certificates. While systems like Git still use it, they're migrating to SHA-256. Avoid SHA-1 in all new security applications.
Current Status: Use only when legacy compatibility is required; new projects should adopt SHA-256 or stronger alternatives.