hmac_crc

Boston Key Party CTF : hamc_crc-5

Category: Crypto **Points:**5 **Solves:**43 Description:

We're trying a new mac here at BKP---HMAC-CRC. The hmac (with our key) of "zupe zecret" is '0xa57d43a032feb286'. What's the hmac of "BKPCTF"?

Write-up

CRC (巡回冗長検査)

solver.sage

Other write-ups and resources

• https://github.com/raccoons-team/ctf/tree/master/2016-03-07-boston-key-party-ctf/crypto_5_hmac_crc
• https://github.com/DeliciousHorse/2016.03.BostonKeyParty/blob/master/hmac_crc.md
• http://andrewl.dreamhosters.com/lblog/2016-03-06_bostonkeyparty_hmac_crc_writeup/writeup.html