SHA-1, or Secure Hash Algorithm 1, is a cryptographic hash function that produces a fixed-size output (160 bits) from any input data. It is widely used for integrity verification and digital signatures. SHA-1 generates a unique hash value, often represented as a hexadecimal number, making it nearly impossible for different inputs to produce the same hash. However, SHA-1 is considered deprecated due to vulnerabilities that allow for collision attacks, where different inputs can produce the same hash, compromising its security.
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