crypto/rand
Cryptoimport "crypto/rand"Implements a cryptographically secure random number generator.
Example
package main
import (
"crypto/rand"
"encoding/hex"
"fmt"
)
func main() {
b := make([]byte, 16)
rand.Read(b)
fmt.Println(hex.EncodeToString(b))
}Key Types & Functions
ReadReaderIntPrimeAbout crypto/rand
The crypto/rand package (imported as crypto/rand) belongs to the Crypto category of Go packages. Implements a cryptographically secure random number generator.
Go's standard library is one of the language's greatest strengths, providing production-ready implementations for networking, cryptography, encoding, I/O, and more. The crypto/rand package follows Go's philosophy of simplicity and composability — small, focused packages that combine through interfaces like io.Reader and io.Writer.
When using crypto/rand in production, follow Go best practices: handle errors explicitly, use context for cancellation and timeouts, prefer composition over inheritance, and write table-driven tests. The Go documentation at pkg.go.dev provides comprehensive API references and examples for every exported type and function.