For 10 points, identify this study of concealing communication, exemplified by Vigenere and Caesar ciphers.
Damgard's development of "claw-free" Hash functions was an important contribution to this field and essential to many techniques in this field are properties of the discrete logarithm, which are applied in a method named for Diffie and Hellman. One of the best-known algorithms in this field relies on the difficulty of factoring the product of two large primes, a public-key algorithm called RSA. For 10 points, identify this study of concealing communication, exemplified by Vigenere and Caesar ciphers.
Damgard's development of "claw-free" Hash functions was an important contribution to this field and essential to many techniques in this field are properties of the discrete logarithm, which are applied in a method named for Diffie and Hellman.
cryptography [or encryption; accept word forms for either]