While using the recommended parameters specified in [RFC 9106][rfc9106-params], the encryption/decryption method took about 0.8 seconds to process on a quad-core Intel processor with 16 GiB of memory. If a master key is composed of 8 characters of upper-case (A-Z), lower-case (a-z) letters and numbers (0-9), and symbols (32), there will be a total of 94 possible characters. Therefore, at least a total of B=nP(r-1) brute-force attacks is required to guess the correct master key. Here "B" is the permutation of (n, r-1). Thus, with the target hardware configuration (quad-core, 16 GiB memory), it will take about 1.3 million computation years to brute-force the 8-character long master key.
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