Patent ID: 8401186
Filing Date: 2013-03-19
Classification: H04L

Abstract:
1. A cloud storage data access method based on OTP comprising: generating and storing in a computer true random numbers of a predetermined length and a random seed of a determined length composed of the true random numbers via a preset method; acquiring data from the random seed for several times and cascading the data acquired each time into a true random data string of no shorter than the length of plaintext; generating a true random cryptographic key of no shorter than the length of the plaintext based on the true random data string; and encrypting the plaintext with the true random cryptographic key and transmitting the encrypted plaintext to a cloud storage data center; wherein the step of cascading comprises: determining whether the length of the true random data string is greater than that of the plaintext, if yes, then randomly acquiring data from the true random data string for several times to generate a new true random data string of no shorter than that of the plaintext; and the step of generating the true random cryptographic key is based on the new random data string.