CODEWITHSUNDEEP
sshcryptographytravis-ci
Brian Brownton
Brian Brownton

Reputation: 1331

Can I generate the full public key from a fingerprint?

Working with travis-ci, and they provide a default public key it seems but only the fingerprint is available (1b:fe:b0:e4:dd:94:ba:46:6a:91:23:60:4a:a7:d0:46).

I know this is generally a processed version (md5 digest with base64 usually) of the public key - is it possible to reverse?

I understand hashes in cryptography are only valuable because they generally cannot be reversed, but since md5 has been broken...

Upvotes: 1

Views: 3084

Answers (1)

VonC
VonC

Reputation: 1323045

Considering what fingerprinting is, no.

As mentioned here

Fingerprint hashing is merging fingerprint recognition and cryptographic methods. The aim is to perform a recognition using fingerprint while, at the same time, hiding the private information related to the fingerprint, thus enabling public fingerprint templates.

It is a one-way hash function, even with md5:

A one-way hash function, also known as a message digest, fingerprint or compression function, is a mathematical function which takes a variable-length input string and converts it into a fixed-length binary sequence.

Upvotes: 3

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