COMPUTATION OF HASH VALUE FOR A MESSAGE BASED ON RECEIVED PORTIONS OF THE MESSAGE

摘要

Hash values for a message may computed by a receiving computer as portions of the message are received. In one embodiment, an intermediate hash value is computed for a portion of the message and a new intermediate hash value computed for each received portion of the message based on a previous intermediate hash value and the contents of the new received portion. When all portions of the message have been received, the final calculated intermediate hash value is the hash value for the entire message. In one embodiment, such a method of calculating a hash value may be based on the SHA-256 hash algorithm or other known or later developed hash algorithms. In one embodiment, the hash calculation for portions of received messages may be applied to keyed-hashing for message authentication (HMAC).

主权项

1. A method, comprising:
receiving a first plurality of bits representing a portion of a message; computing a first hash value based, at least in part, on a portion of the first plurality of bits; receiving a second plurality of bits representing a second portion of the message; and computing a second hash value based, at least in part, on the first hash value and at least a portion of the second plurality of bits.