OATH OTP calculator (HOTP, TOTP and OCRA)

Calculate one time pass codes using OATH HOTP/TOTP. It also includes challenges and responses according to the OATH OCRA protocol.

Shared secret:
Number of digits:
6
7
8
HOTP Counter (hex number, e.g., "1BC")
TOTP
Time
Time step
OCRA
Counter (optional)
Remote challenge
Local challenge (optional)
Password (optional)
Session info (optional)
Timestamp (optional)
Algorithm:
Input string (hex):

Cryptomathic is one of the world's leading providers of security solutions to businesses across a wide range of industry sectors including finance, smart card, digital rights management and government. Cryptomathic provides cryptographic solutions for Authentication & Signing, EMV, CA-Compliance, Key Management, Public Key Infrastructure and ID Issuing.



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