What are the best asymmetric encryption algorithms out there? I am trying to use RSA in my project howoever I have read that it is not quite secure as other asymmetric encryption algorithms.
closed as not a real question by Adnan, Gilles, AJ Henderson, Iszi, lynks Apr 30 at 16:57
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"Best" implies some gradation on a scale, which should be defined...
The most commonly used asymmetric encryption algorithm is RSA. It is good enough for most purposes. RSA has some limitations, which are rather generic (i.e. which apply to most other asymmetric encryption algorithms as well):
To work around most of these issues, hybrid encryption is used: with RSA, you encrypt a random symmetric key (i.e. 128 random bits) and you use that key to encrypt the bulk of the data with a faster, less constrained symmetric encryption algorithm like AES.
Another relatively common asymmetric encryption algorithm is ElGamal. Its elliptic curve variants can offer better performance than RSA (faster, less size overhead), but hybrid encryption is still needed.
Assembling asymmetric and symmetric encryption correctly is not an easy task, so don't go creative and invent your own (it is easy to have something which works, but very hard to obtain something which works securely). Instead, use an existing protocol where all the tricky details have been worked out; e.g. OpenPGP.