# Tagged Questions

A test vector is a set of inputs used to test new and/or established cryptographic designs and/or implementations.

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### Test Vectors for ciphers

While implementing ciphers (/hash functions, ...), I often face this problem: Where to find test vectors for it; so that I can guarantee my program is correct. It is generally a tedious job to find ...
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### Testing implementation of cryptography algorithms: Brainstorm

I wonder what kind of techniques can be used to validate implementation of cryptography algorithms? The obvious one is to run specific algorithms against publically known test vectors (i.e. from ...
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### Is there any place where I can find test vectors for point addition and doubling of ECC?

I want to extensively test my implementation of point addition and doubling. I have only one test vector with me. I need more values to test. In the web, I could find test vectors only for key pair ...
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### Test vectors for PRESENT algorithm?

I'm looking for Test Vectors to test my implementation of PRESENT. I would like to test a different input from the usual where the key and the plaintext are either 000..000 or FFF...FFF.
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### Problem reproducing AES results

First of all, I just implemented AES because I wanted to understand how it works and as a challenge to see if I could do it and I won't use to encrypt anything important, ever. The (German) Wikipedia ...
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### Test vectors representation

The test vectors listed in https://github.com/cantora/avr-crypto-lib/blob/master/testvectors/Mickey-v2-128-unverified.test-vectors Are represented as Hex strings? I'm sure that the key is, because ...
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### Intermediate values for testing Blowfish

I am trying to implement the Blowfish algorithm in VHDL. To debug my code, I need the intermediate values of s-box and P vectors after each iteration. Where can I find this data set? p.s :- I know ...
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### Where are the ChaCha20 test vectors/examples?

I see in the Salsa20 specification there are test examples throughout the document to help an implementer make sure every function works as designed. Consequently the whole algorithm would work ...
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### Test vectors for TLS PRF function

Does anyone know where I might be able to find test vectors for the PRF function in TLS? (either 1.0 or newer). I'm trying to implement a client and I am getting the BAD Record MAC return after ...
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### NTRU test vectors

Where can I find NTRU test vectors? In some research work in 2001, it is stated that test vectors were not publicly available at the time. Then in this ESSS1v2 standard under IEEE1363 here , the ...
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### Testing the Fortuna random number generator?

I have implemented the Fortuna random number generator as described in chapter 10 of "Practical Cryptography" (Ferguson and Schneier, Wiley, 2003), the result can be found at http://www.seehuhn.de/...
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### Are there any Secp256k1 ECDSA test examples available?

Are there any available test cases for testing elliptic curves like secp256k1 (Korblitz curves from http://www.secg.org/collateral/sec2_final.pdf)? For curves like P192 there are for example those ...
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### test vectors for 3DES seem to in fact be testing DES - not 3DES

NIST SP 800-20 Appendix A has what presumably are supposed to be test vectors for 3DES except almost all of the test vectors utilize 8-byte keys and not the 24-byte keys that 3DES is supposed to have. ...
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### OpenSSL des-ede3 not producing same output as test vector implies it should be

I'm encrypting one of the standard TDEA/3DES/DES-EDE test vectors with openssl: ...
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### what are the plaintext's for the RC4 stream cipher test vectors in RFC6229?

https://tools.ietf.org/html/rfc6229 has stuff like this: ...
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### CAST-256 (CAST6) versions or S-Boxes

Are there different versions of CAST-256 - also known as CAST6 - available? Are there different S-Boxes available for CAST-256? If there are different versions or S-Boxes what identifier should I use ...
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### Wrong Test Vector for HKDF with HMAC-SHA256 [closed]

I have implemented HKDF by myself and it seems to work good. I managed to replicate all the test vectors listed here but... except this one: ...
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### Do test vectors ensure a cipher is free of backdoors?

If a cipher implementation passes unit tests using test vectors from some trusted source (these for AES, for example), then can we say that it is fully conforming to the specification, and must have ...
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### Where can I find Secp256k1 ECDSA test vectors?

I`m currently implementing an ECDSA library based on curves like secp256k1. I would like to test it using some test vectors, like http://csrc.nist.gov/groups/STM/cavp/documents/dss/ecdsatestvectors....
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### Elgamal test vectors

I know that Elgamal algorithms have fallen out of fashion, and they are not included in any widespread cryptographic standard nowadays. However, they are still present in several popular crypto ...
Does any one have, or can refer to a Known-Answer-Test (KAT) for Triple DES Keying Option 2? (Keying Option 2 means $C = DES_{k_1}(DES^{-1}_{k_2}(DES_{k_1}(P)))$ for encryption and \$P = DES^{-1}_{k_1}...