Cryptography, Cybersecurity, Number Theory, Information Security, Rsa.
309, together comprised the ciphered bank routing number, which Steve sends to Anthony over an insecure channel. Anthony, using his secret key a, computes c1^a = 87¹⁵³ (mod 467) = 367. He then computes the multiplicative inverse of 367 in mod 467, which is 14. Anthony multiplies 14 to c2 mod 467,