Check if a string has high entropy

Determines whether a string has suspiciously high Shannon entropy, suggesting it may be a secret, key, or random token.

Usage

is_high_entropy(s, base64_threshold = 4.5, hex_threshold = 3, min_length = 20L)

Arguments

s

Character(1). The string to check.

base64_threshold

Numeric(1). Entropy threshold for base64-like strings (default 4.5).

hex_threshold

Numeric(1). Entropy threshold for hex-like strings (default 3.0).

min_length

Integer(1). Minimum string length to consider (default 20). Shorter strings always return FALSE.

Value

Logical(1).

See also

shannon_entropy(), guard_output_entropy()

Examples

is_high_entropy("aaaaaaaaaaaaaaaaaaaaa")  # FALSE (low entropy)
#> [1] FALSE
is_high_entropy("aB3xK9pQ2mR7nL4wS8vD")  # likely TRUE
#> [1] FALSE