There are a number of well-designed and well-tested crypto libraries available to fit the bill, but experts say there is plenty of room for cryptographers to develop more high-level libraries to fill in the gaps. Experts recommend that developers avoid implementing their own crypto at all costs and to insist on a rigorous review process if developers decide to use custom crypto. The hack it till it works mentality just doesn t work with crypto, but it s very unsafe, experts say.
Source: https://threatpost.com/crypto-flaws-becoming-killer-web-applications-060809/72722/