Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
Crawl FS from Alexa Internet. This data is currently not publicly accessible.
Hashes create Individual Digital Fingerprints
The hash code is a unique digital fingerprint, because it reflects every
bit in the record. If a single bit were to change, the fingerprint would
be different.
The fingerprints are then combined with fingerprints of other
records...
Surety receives requests for certification in one second intervals
Below, we have records A and B from different companies.
Their hashes will be transmitted to Surety during the same period.
Surety builds a tree of these document hashes to tie them all together.
Below, the Digital Notary Software concatenates the hashes of A and
B, that is, it places the two 288 bit hashes end-to-end, making a 576 bit
record.
Then the software rehashes, creating an intermediate 288 bit hash representing
and linking the hashes of document A and document B.
We now have moved up to Level 1 in the tree.
Below, we get to the root of the tree at level 0 by concatenating the
two intermediate level hashes from level 1 and rehashing to get the Root
Hash Value. Note that we are still in the same second in time.
Finally, below is the last step is to combine the Root Hash Value of
our tree for the current second with Surety's Super Hash Value for the previous
second.
The Super Hash Value is the "hash of the hash" of all requests
for certification ever received by Surety.
The Super Hash Value is stored in Surety's Universal Registry at Surety.
Now we have linked together all the certifications ever done by Surety
so that each one is dependent on every other one.
In short, you can trust Surety, because you don't have to. Surety can
not unweave the fabric of the Universal Registry.
Thus, as illustrated below, the Super Hash Value is updated every second
with the certification requests received during that second and the SHV
from the previous second. Therefore, Surety's Universal Registry is updated
every second or about 31 million times a year.
Because each second is only 288 bits, the Universal Registry record
grows only slightly linearly in time.
To discuss your corporate requirements, please contact a Surety account
representative
at 973-360-3900 or email us at support2@surety.com.
Digital Notary, Digital Audit Trail and the Surety logo are trademarks of
Surety Technologies, Inc.
All other trademarks used are the properties of their respective companies.
Hashes create Individual Digital Fingerprints
