Homomorphic what?
Homomorphic encryption is a form of encryption which allows specific types of computations to be carried out on ciphertext and obtain an encrypted result which is the ciphertext of the result of operations performed on the plaintext. For instance, one person could add two encrypted numbers and then another person could decrypt the result, without either of them being able to find the value of the individual numbers. Homomorphic encryption schemes are malleable by design. The homomorphic property of various cryptosystems can be used to create secure voting systems,[1] collision-resistant hash functions, private information retrieval schemes and enable widespread use of cloud computing by ensuring the confidentiality of processed data.
There are several efficient, partially homomorphic cryptosystems, and two fully homomorphic, but less efficient cryptosystems. Although a cryptosystem which is unintentionally homomorphic can be subject to attacks on this basis, if treated carefully homomorphism can also be used to perform computations securely.
There are several efficient, partially homomorphic cryptosystems, and two fully homomorphic, but less efficient cryptosystems. Although a cryptosystem which is unintentionally homomorphic can be subject to attacks on this basis, if treated carefully homomorphism can also be used to perform computations securely.
Seems to me like it can be very useful in several ways, but it's also very strange to think about. I wonder how this is (ever?) going to change the world in which we live in. Seems to me like this is both good and bad news for intellectual property holders. On one hand you'd be able to play music without ever actually having the 'real' music on your disk, but on the other hand this really reinforces the notion that data is what you make of it. Do you have a hard drive full of encrypted and illegal games or is it just random data?
Originally Posted by .::SCHiM::.
