GENERATE SSH ON MAC MAC

How Hash values work in finding the integrity of data? If you want to test the integrity of a file in future, calculate and keep the Hash value string, using any good Hashing algorithm.

RIPEMDР В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™160 : RIPEMDР В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™160 is a more secure version of the RIPEMD (RIPE Message Digest) Hashing algorithm, which generates 160Р В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™bit Hash value.

SHAР В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™3 : SHAР В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™3 is also a family of Hashing algorithms.

SHAР В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™2 : SHAР В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™2 is a family of Hashing algorithms.

SHAР В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™1 corrected security flaw in SHAР В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™0 that made it susceptible to attacks.

SHAР В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™1 : SHAР В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™1 also generates a 160Р В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™bit hash value.

SHA or SHA-0 (Secure Hashing Algorithm) : SHA was invented by NSA to be used with the Digital Signature Standard (DSS).

MD5 also has a 128Р В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™bit hash, and considered much secure than MD4.

MD5 (Message Digest 5) : MD5 was also invented by Ron Rivest of RSA Security LLC.

MD4 produces a 128Р В Р вЂ Р В РІР‚С™Р Р†Р вЂљРЎС™bit Hash value string.

MD4 (Message Digest 4) : MD4 was invented by Ron Rivest of RSA Security LLC.

For newer Hashing algorithms, theoretically it is impossible for a Hash value collision to happen.

The incident of getting same Hash value for two different data contents is called as Hash value collision.

Meaning is that, it is theoretically impossible to find the original data from Hash value strings.

Unlike Encryption algorithms, Hashing algorithms are not reversible.

But the output of a particular Hash value string generated by a particular Hashing algorithm, will be of fixed length.

The chunk of data on which the Hashing algorithm is run, can be of any length/size.

Please find some points about Hash values bullet pointed below. These are used to ensure that the received message text is intact and unmodified. HMAC uses Hash values to generate HMAC codes. The main use of Hash values in SSH is with HMAC (Hashed Message Authentication Code). In SSH, Hash values are mainly used for checking data integrity (data is not modified accidently or intentionally), and to verify the authenticity of communication. The output string of a Hashing algorithm is generally called as a Hash value.

Modifying even a single bit of the data will result in generating an entirely different Hash value, next time when you run the same Hashing algorithm on that data again. Hashing algorithms generate a unique Hash string as output, taking a chunk of data as the input. Hashing algorithms are used to generate Hash values from a chunk of data.

GENERATE SSH ON MAC MAC

The purpose of Hashing algorithms, MAC (Message Authentication Code) and HMAC (Hashed Message Authentication Code) in SSH is for validating whether the received packets are from the real original sender and the data packets are not tampered/corrupted during network transit.

Generate ssh on mac