This spell causes writings, inscriptions, and even magical symbols and glyphs to become temporarily unintelligible. The writing looks normal to the casual viewer, but seems meaningless whenever anyone tries to actively read it.
When this spell is applied to nonmagical writing, characters with the Linguistics skill can attempt to piece together the meaning - add this spell's caster level to the normal Linguistics DC (10 for writing that would be readable normally). Placing this spell on magical writing such as a scroll or spellbook increases the Spellcraft DC to decipher the writing by +1 per caster level.
Placing this spell on a scribed magical ward does not disrupt the ward's function but might prevent it from being recognized. For example, explosive runes with an obscure text spell applied still detonates when an attempt to read them is made, but the attempt won't reveal the runes' meaning (if any). Likewise, an illusory script with an obscure text spell applied still implants its suggestion in the minds of unauthorized readers. The Spellcraft DC to identify a ward under the effects of obscure script increases by +1 per caster level, but note that placing this spell on a ward triggered by touch activates the ward unless you succeed on a caster level check (DC 10 + the ward's caster level).
Obscure text is difficult to dispel, adding a +5 bonus to its dispel check DC.
Section 15: Copyright Notice – 101 2nd Level Spells