Why does jasypt number encryption support only apply to BigInteger and BigDecimal?
Because numbers are encrypted using the byte encryption support (encryption algorithms refer to bytes, not numbers), and so the result of encrypting a number will span a higher number of bytes than the original number. This provokes that a 4-byte integer needs no less than 16 bytes when it is in encrypted form. Because of this, only BigIntegers and BigDecimals are supported in jasypt, as they provide arbitrary precision and so can handle such a big amount of bytes. Nevertheless, if you are looking for hibernate encryption support for Longs, Doubles, Integers… jasypt provides support for encrypting them stored into SQL VARCHAR fields (instead of NUMERIC ones). Have a look at the Hibernate Integration Guide for further details.
